diff --git a/Protobuf-C++.podspec b/Protobuf-C++.podspec
index 26e3825da9f7..fc3087fc3630 100644
--- a/Protobuf-C++.podspec
+++ b/Protobuf-C++.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name     = 'Protobuf-C++'
-  s.version  = '3.15.7'
+  s.version  = '3.16.0-rc1'
   s.summary  = 'Protocol Buffers v3 runtime library for C++.'
   s.homepage = 'https://github.com/google/protobuf'
   s.license  = '3-Clause BSD License'
diff --git a/Protobuf.podspec b/Protobuf.podspec
index 28a046a23d8b..253854ccd235 100644
--- a/Protobuf.podspec
+++ b/Protobuf.podspec
@@ -5,7 +5,7 @@
 # dependent projects use the :git notation to refer to the library.
 Pod::Spec.new do |s|
   s.name     = 'Protobuf'
-  s.version  = '3.15.7'
+  s.version  = '3.16.0-rc1'
   s.summary  = 'Protocol Buffers v.3 runtime library for Objective-C.'
   s.homepage = 'https://github.com/protocolbuffers/protobuf'
   s.license  = '3-Clause BSD License'
diff --git a/configure.ac b/configure.ac
index 0f4b0910c423..5d56ac1ef9f3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,7 +17,7 @@ AC_PREREQ(2.59)
 # In the SVN trunk, the version should always be the next anticipated release
 # version with the "-pre" suffix.  (We used to use "-SNAPSHOT" but this pushed
 # the size of one file name in the dist tarfile over the 99-char limit.)
-AC_INIT([Protocol Buffers],[3.15.7],[protobuf@googlegroups.com],[protobuf])
+AC_INIT([Protocol Buffers],[3.16.0-rc-1],[protobuf@googlegroups.com],[protobuf])
 
 AM_MAINTAINER_MODE([enable])
 
diff --git a/csharp/Google.Protobuf.Tools.nuspec b/csharp/Google.Protobuf.Tools.nuspec
index 9af72081a5a0..1c6ca92873d5 100644
--- a/csharp/Google.Protobuf.Tools.nuspec
+++ b/csharp/Google.Protobuf.Tools.nuspec
@@ -5,7 +5,7 @@
     <title>Google Protocol Buffers tools</title>
     <summary>Tools for Protocol Buffers - Google's data interchange format.</summary>
     <description>See project site for more info.</description>
-    <version>3.15.7</version>
+    <version>3.16.0-rc1</version>
     <authors>Google Inc.</authors>
     <owners>protobuf-packages</owners>
     <licenseUrl>https://github.com/protocolbuffers/protobuf/blob/master/LICENSE</licenseUrl>
diff --git a/csharp/src/Google.Protobuf/Google.Protobuf.csproj b/csharp/src/Google.Protobuf/Google.Protobuf.csproj
index 1a5f3423fae1..8e5f59b9ee03 100644
--- a/csharp/src/Google.Protobuf/Google.Protobuf.csproj
+++ b/csharp/src/Google.Protobuf/Google.Protobuf.csproj
@@ -1,10 +1,10 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <Description>C# runtime library for Protocol Buffers - Google's data interchange format.</Description>
     <Copyright>Copyright 2015, Google Inc.</Copyright>
     <AssemblyTitle>Google Protocol Buffers</AssemblyTitle>
-    <VersionPrefix>3.15.7</VersionPrefix>
+    <VersionPrefix>3.16.0-rc1</VersionPrefix>
     <!-- C# 7.2 is required for Span/BufferWriter/ReadOnlySequence -->
     <LangVersion>7.2</LangVersion>
     <Authors>Google Inc.</Authors>
diff --git a/java/bom/pom.xml b/java/bom/pom.xml
index c8a92e466a5b..461d6cc9c87d 100644
--- a/java/bom/pom.xml
+++ b/java/bom/pom.xml
@@ -4,7 +4,7 @@
 
   <groupId>com.google.protobuf</groupId>
   <artifactId>protobuf-bom</artifactId>
-  <version>3.15.7</version>
+  <version>3.16.0-rc-1</version>
   <packaging>pom</packaging>
 
   <name>Protocol Buffers [BOM]</name>
diff --git a/java/core/pom.xml b/java/core/pom.xml
index 0176b9fc26bc..ee97fecdb340 100644
--- a/java/core/pom.xml
+++ b/java/core/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.protobuf</groupId>
     <artifactId>protobuf-parent</artifactId>
-    <version>3.15.7</version>
+    <version>3.16.0-rc-1</version>
   </parent>
 
   <artifactId>protobuf-java</artifactId>
diff --git a/java/lite/pom.xml b/java/lite/pom.xml
index 20740038f7cc..7e73849471c7 100644
--- a/java/lite/pom.xml
+++ b/java/lite/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.protobuf</groupId>
     <artifactId>protobuf-parent</artifactId>
-    <version>3.15.7</version>
+    <version>3.16.0-rc-1</version>
   </parent>
 
   <artifactId>protobuf-javalite</artifactId>
diff --git a/java/pom.xml b/java/pom.xml
index b93d8ea49c03..4f8598d8beb9 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -4,7 +4,7 @@
 
   <groupId>com.google.protobuf</groupId>
   <artifactId>protobuf-parent</artifactId>
-  <version>3.15.7</version>
+  <version>3.16.0-rc-1</version>
   <packaging>pom</packaging>
 
   <name>Protocol Buffers [Parent]</name>
diff --git a/java/util/pom.xml b/java/util/pom.xml
index 58999799b957..a1cfc9bc00b7 100644
--- a/java/util/pom.xml
+++ b/java/util/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.google.protobuf</groupId>
     <artifactId>protobuf-parent</artifactId>
-    <version>3.15.7</version>
+    <version>3.16.0-rc-1</version>
   </parent>
 
   <artifactId>protobuf-java-util</artifactId>
diff --git a/js/package.json b/js/package.json
index db83dc5acd9a..6c0e3adbd9fe 100644
--- a/js/package.json
+++ b/js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "google-protobuf",
-  "version": "3.15.7",
+  "version": "3.16.0-rc.1",
   "description": "Protocol Buffers for JavaScript",
   "main": "google-protobuf.js",
   "files": [
diff --git a/php/ext/google/protobuf/package.xml b/php/ext/google/protobuf/package.xml
index f20eb109a030..617133cb2066 100644
--- a/php/ext/google/protobuf/package.xml
+++ b/php/ext/google/protobuf/package.xml
@@ -11,14 +11,14 @@
   <active>yes</active>
  </lead>
  <date>2021-04-02</date>
- <time>10:01:42</time>
+ <time>16:11:33</time>
  <version>
-  <release>3.15.7</release>
-  <api>3.15.7</api>
+  <release>3.16.0RC1</release>
+  <api>3.16.0</api>
  </version>
  <stability>
-  <release>stable</release>
-  <api>stable</api>
+  <release>beta</release>
+  <api>beta</api>
  </stability>
  <license uri="https://opensource.org/licenses/BSD-3-Clause">3-Clause BSD License</license>
  <notes>
@@ -902,5 +902,20 @@ G  A release.
    <notes>
    </notes>
   </release>
+  <release>
+   <version>
+    <release>3.16.0RC1</release>
+    <api>3.16.0</api>
+   </version>
+   <stability>
+    <release>beta</release>
+    <api>beta</api>
+   </stability>
+   <date>2021-04-02</date>
+   <time>16:11:33</time>
+   <license uri="https://opensource.org/licenses/BSD-3-Clause">3-Clause BSD License</license>
+   <notes>
+   </notes>
+  </release>
  </changelog>
 </package>
diff --git a/php/ext/google/protobuf/protobuf.h b/php/ext/google/protobuf/protobuf.h
index 46886746d4a6..b927c9fecccb 100644
--- a/php/ext/google/protobuf/protobuf.h
+++ b/php/ext/google/protobuf/protobuf.h
@@ -76,7 +76,7 @@ ZEND_BEGIN_ARG_INFO_EX(arginfo_setter, 0, 0, 1)
   ZEND_ARG_INFO(0, value)
 ZEND_END_ARG_INFO()
 
-#define PHP_PROTOBUF_VERSION "3.15.7"
+#define PHP_PROTOBUF_VERSION "3.16.0RC1"
 
 // ptr -> PHP object cache. This is a weak map that caches lazily-created
 // wrapper objects around upb types:
diff --git a/protoc-artifacts/pom.xml b/protoc-artifacts/pom.xml
index defc194e8a3a..ddf65c81284d 100644
--- a/protoc-artifacts/pom.xml
+++ b/protoc-artifacts/pom.xml
@@ -8,7 +8,7 @@
   </parent>
   <groupId>com.google.protobuf</groupId>
   <artifactId>protoc</artifactId>
-  <version>3.15.7</version>
+  <version>3.16.0-rc-1</version>
   <packaging>pom</packaging>
   <name>Protobuf Compiler</name>
   <description>
diff --git a/python/google/protobuf/__init__.py b/python/google/protobuf/__init__.py
index e4d941cf4a3f..80a7bd0158f6 100644
--- a/python/google/protobuf/__init__.py
+++ b/python/google/protobuf/__init__.py
@@ -30,4 +30,4 @@
 
 # Copyright 2007 Google Inc. All Rights Reserved.
 
-__version__ = '3.15.7'
+__version__ = '3.16.0rc1'
diff --git a/ruby/google-protobuf.gemspec b/ruby/google-protobuf.gemspec
index 7ff45f8114e8..fab7842cd2d6 100644
--- a/ruby/google-protobuf.gemspec
+++ b/ruby/google-protobuf.gemspec
@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name        = "google-protobuf"
-  s.version     = "3.15.7"
+  s.version     = "3.16.0.rc.1"
   git_tag       = "v#{s.version.to_s.sub('.rc.', '-rc')}" # Converts X.Y.Z.rc.N to vX.Y.Z-rcN, used for the git tag
   s.licenses    = ["BSD-3-Clause"]
   s.summary     = "Protocol Buffers"
diff --git a/src/Makefile.am b/src/Makefile.am
index 648c2679f301..e0c6680d829a 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -18,7 +18,7 @@ else
 PTHREAD_DEF =
 endif
 
-PROTOBUF_VERSION = 26:7:0
+PROTOBUF_VERSION = 27:0:0
 
 if GCC
 # Turn on all warnings except for sign comparison (we ignore sign comparison
diff --git a/src/google/protobuf/any.pb.h b/src/google/protobuf/any.pb.h
index 824934f2e202..81aebe88bfed 100644
--- a/src/google/protobuf/any.pb.h
+++ b/src/google/protobuf/any.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3015000
+#if PROTOBUF_VERSION < 3016000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3015007 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3016000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/api.pb.h b/src/google/protobuf/api.pb.h
index df547600373c..13e42d1a7d76 100644
--- a/src/google/protobuf/api.pb.h
+++ b/src/google/protobuf/api.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3015000
+#if PROTOBUF_VERSION < 3016000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3015007 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3016000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/compiler/plugin.pb.h b/src/google/protobuf/compiler/plugin.pb.h
index e2bfb2c9b2da..af51e546ae6b 100644
--- a/src/google/protobuf/compiler/plugin.pb.h
+++ b/src/google/protobuf/compiler/plugin.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3015000
+#if PROTOBUF_VERSION < 3016000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3015007 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3016000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/descriptor.pb.h b/src/google/protobuf/descriptor.pb.h
index 27be4912c28d..861cc4aadcec 100644
--- a/src/google/protobuf/descriptor.pb.h
+++ b/src/google/protobuf/descriptor.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3015000
+#if PROTOBUF_VERSION < 3016000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3015007 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3016000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/duration.pb.h b/src/google/protobuf/duration.pb.h
index 0aedba45f44b..fdab83d79b28 100644
--- a/src/google/protobuf/duration.pb.h
+++ b/src/google/protobuf/duration.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3015000
+#if PROTOBUF_VERSION < 3016000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3015007 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3016000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/empty.pb.h b/src/google/protobuf/empty.pb.h
index 289e5570c607..eb3c11c3b851 100644
--- a/src/google/protobuf/empty.pb.h
+++ b/src/google/protobuf/empty.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3015000
+#if PROTOBUF_VERSION < 3016000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3015007 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3016000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/field_mask.pb.h b/src/google/protobuf/field_mask.pb.h
index 355dff4b8d5f..e6047def3ad7 100644
--- a/src/google/protobuf/field_mask.pb.h
+++ b/src/google/protobuf/field_mask.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3015000
+#if PROTOBUF_VERSION < 3016000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3015007 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3016000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/port_def.inc b/src/google/protobuf/port_def.inc
index 73cd6303521e..6761a00655b1 100644
--- a/src/google/protobuf/port_def.inc
+++ b/src/google/protobuf/port_def.inc
@@ -337,14 +337,14 @@
 
 // Shared google3/opensource definitions. //////////////////////////////////////
 
-#define PROTOBUF_VERSION 3015007
-#define PROTOBUF_MIN_HEADER_VERSION_FOR_PROTOC 3015000
-#define PROTOBUF_MIN_PROTOC_VERSION 3015000
-#define PROTOBUF_VERSION_SUFFIX ""
+#define PROTOBUF_VERSION 3016000
+#define PROTOBUF_MIN_HEADER_VERSION_FOR_PROTOC 3016000
+#define PROTOBUF_MIN_PROTOC_VERSION 3016000
+#define PROTOBUF_VERSION_SUFFIX "-rc1"
 
 // The minimum library version which works with the current version of the
 // headers.
-#define GOOGLE_PROTOBUF_MIN_LIBRARY_VERSION 3015000
+#define GOOGLE_PROTOBUF_MIN_LIBRARY_VERSION 3016000
 
 #if defined(GOOGLE_PROTOBUF_NO_RTTI) && GOOGLE_PROTOBUF_NO_RTTI
 #define PROTOBUF_RTTI 0
diff --git a/src/google/protobuf/source_context.pb.h b/src/google/protobuf/source_context.pb.h
index cd3213a77c78..ef589983717a 100644
--- a/src/google/protobuf/source_context.pb.h
+++ b/src/google/protobuf/source_context.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3015000
+#if PROTOBUF_VERSION < 3016000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3015007 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3016000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/struct.pb.h b/src/google/protobuf/struct.pb.h
index 8dbefa416d0a..f0ee367effef 100644
--- a/src/google/protobuf/struct.pb.h
+++ b/src/google/protobuf/struct.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3015000
+#if PROTOBUF_VERSION < 3016000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3015007 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3016000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/stubs/common.h b/src/google/protobuf/stubs/common.h
index 4bac057f5668..8beedd7ab817 100644
--- a/src/google/protobuf/stubs/common.h
+++ b/src/google/protobuf/stubs/common.h
@@ -82,23 +82,23 @@ namespace internal {
 
 // The current version, represented as a single integer to make comparison
 // easier:  major * 10^6 + minor * 10^3 + micro
-#define GOOGLE_PROTOBUF_VERSION 3015007
+#define GOOGLE_PROTOBUF_VERSION 3016000
 
 // A suffix string for alpha, beta or rc releases. Empty for stable releases.
-#define GOOGLE_PROTOBUF_VERSION_SUFFIX ""
+#define GOOGLE_PROTOBUF_VERSION_SUFFIX "-rc1"
 
 // The minimum header version which works with the current version of
 // the library.  This constant should only be used by protoc's C++ code
 // generator.
-static const int kMinHeaderVersionForLibrary = 3015000;
+static const int kMinHeaderVersionForLibrary = 3016000;
 
 // The minimum protoc version which works with the current version of the
 // headers.
-#define GOOGLE_PROTOBUF_MIN_PROTOC_VERSION 3015000
+#define GOOGLE_PROTOBUF_MIN_PROTOC_VERSION 3016000
 
 // The minimum header version which works with the current version of
 // protoc.  This constant should only be used in VerifyVersion().
-static const int kMinHeaderVersionForProtoc = 3015000;
+static const int kMinHeaderVersionForProtoc = 3016000;
 
 // Verifies that the headers and libraries are compatible.  Use the macro
 // below to call this.
diff --git a/src/google/protobuf/timestamp.pb.h b/src/google/protobuf/timestamp.pb.h
index f399dd03fe9a..cc5efca92ed0 100644
--- a/src/google/protobuf/timestamp.pb.h
+++ b/src/google/protobuf/timestamp.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3015000
+#if PROTOBUF_VERSION < 3016000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3015007 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3016000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/type.pb.h b/src/google/protobuf/type.pb.h
index 7d0cd6d08f1b..a34fd6006063 100644
--- a/src/google/protobuf/type.pb.h
+++ b/src/google/protobuf/type.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3015000
+#if PROTOBUF_VERSION < 3016000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3015007 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3016000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.
diff --git a/src/google/protobuf/wrappers.pb.h b/src/google/protobuf/wrappers.pb.h
index 0bc494958593..5659b5f4adb3 100644
--- a/src/google/protobuf/wrappers.pb.h
+++ b/src/google/protobuf/wrappers.pb.h
@@ -8,12 +8,12 @@
 #include <string>
 
 #include <google/protobuf/port_def.inc>
-#if PROTOBUF_VERSION < 3015000
+#if PROTOBUF_VERSION < 3016000
 #error This file was generated by a newer version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please update
 #error your headers.
 #endif
-#if 3015007 < PROTOBUF_MIN_PROTOC_VERSION
+#if 3016000 < PROTOBUF_MIN_PROTOC_VERSION
 #error This file was generated by an older version of protoc which is
 #error incompatible with your Protocol Buffer headers. Please
 #error regenerate this file with a newer version of protoc.