diff --git a/CHANGES b/CHANGES
index 3a61405a012..f9c881f1fd1 100644
--- a/CHANGES
+++ b/CHANGES
@@ -92,6 +92,8 @@ Bugs fixed
   modifier keys are ignored, which means the feature can interfere with browser
   features
 * #7090: std domain: Can't assign numfig-numbers for custom container nodes
+* #7106: std domain: enumerated nodes are marked as duplicated when extensions
+  call ``note_explicit_target()``
 * #7095: dirhtml: Cross references are broken via intersphinx and ``:doc:`` role
 
 Testing
diff --git a/sphinx/transforms/__init__.py b/sphinx/transforms/__init__.py
index 922b22e464b..a00f04fdfef 100644
--- a/sphinx/transforms/__init__.py
+++ b/sphinx/transforms/__init__.py
@@ -173,7 +173,9 @@ def apply(self, **kwargs: Any) -> None:
         domain = self.env.get_domain('std')  # type: StandardDomain
 
         for node in self.document.traverse(nodes.Element):
-            if domain.is_enumerable_node(node) and domain.get_numfig_title(node) is not None:
+            if (domain.is_enumerable_node(node) and
+                    domain.get_numfig_title(node) is not None and
+                    node['ids'] == []):
                 self.document.note_implicit_target(node)