[Koha] Duplicate entry 'ar' for key 'PRIMARY'

Hello, Has any colleague in the group already had this problem when trying to update the database? Upgrade to 21.12.00.013 [19:25:20]: Bug 29605 - Resync DB structure for existing installations ERROR - {UNKNOWN}: DBI Exception: DBD::mysql::db do failed: Duplicate entry 'ar' for key 'PRIMARY' at /usr/share/koha/lib/C4/Installer.pm line 739 Grateful if you can share with me the solution of the error.