MSSQL - kvv2 secret engine - String or binary data would be trucated when too many string : "/" are in the path

[flalisse]

Describe the bug
When I want to enter a secret behind a fairly long path (we use a detailed naming convention based on separations using "/") I get a mssql error "
"* mssql: String or binary data would be truncated" and the secret is never added. "

To Reproduce

1. Connect to the GUI using any token or classic login
2. Try to insert on a kvv2-mount point a secret behind this path : kvv2prod/test/test/test/test/test/test/test
3. I receive mssql error : "* mssql: String or binary data would be truncated" and the secret is never added. "

Note : with one "/" remove so six"/" in the path instead of seven it's working.

Expected behavior
The secret should be added correctly under the defined path

Environment:

• Vault Server Version (retrieve with vault status):
  vault status
  Key Value

---

Seal Type shamir
Initialized true
Sealed false
Total Shares 5
Threshold 3
Version 1.14.0
Build Date 2023-06-19T11:40:23Z
Storage Type mssql
Cluster Name vault-cluster-59a73dca
Cluster ID abe3c9b3-b1f1-4ce9-9143-3c3cf7b22822
HA Enabled false

• Vault CLI Version (retrieve with vault version):
  Vault v1.14.0 (13a649f), built 2023-06-19T11:40:23Z

• Server Operating System/Architecture:
  RHEL9
  Kernel : Linux 5.14.0-70.22.1.el9_0.x86_64 Initial Website Import #1 SMP PREEMPT Tue Aug 2 10:02:12 EDT 2022 x86_64 x86_64 x86_64 GNU/Linux

Vault server configuration file(s):

#The content of this file is automatically generated by Ansible template module
# Full configuration options can be found at https://www.vaultproject.io/docs/configuration

ui = "true"

# all of those parameters have to be adapted before going in production

storage "mssql" {
  server = "xxxxxxxxxxxxxxxxxxx"
  port = 1433
  username = "xxxxxxxxxxxxxxxx"
  password = "xxxxxxxxxxxxxxxx"
  database = "Vault"
  table = "Vault"
  appname = "Vault"
  schema = "dbo"
  connectionTimeout = 30
  logLevel = 0
  max_parallel = "128"
}


#HTTP Listener
listener "tcp" {
  address       = "0.0.0.0:8200"
  tls_cert_file = "/opt/vault/tls/xxx.cer"
  tls_key_file  = "/opt/vault/tls/xxx.key"
  tls_client_ca_file = "/opt/vault/tls/xxx.crt"