diff --git a/locales/en.json b/locales/en.json
index ce36edaa4..cfb8a01f9 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -507,6 +507,7 @@
     "migration_0018_failed_to_reset_legacy_rules": "Failed to reset legacy iptables rules: {error}",
     "migration_0019_add_new_attributes_in_ldap": "Add new attributes for permissions in LDAP database",
     "migration_0019_slapd_config_will_be_overwritten": "It looks like you manually edited the slapd configuration. For this critical migration, YunoHost needs to force the update of the slapd configuration. The original files will be backuped in {conf_backup_folder}.",
+	"migration_0021_venv_regen_failed": "The virtual environment '{venv}' failed to regenerate, you probably need to run the command `yunohost app upgrade --force`",
     "migration_0021_start" : "Starting migration to Bullseye",
     "migration_0021_patching_sources_list": "Patching the sources.lists...",
     "migration_0021_main_upgrade": "Starting main upgrade...",
diff --git a/src/yunohost/data_migrations/0021_migrate_to_bullseye.py b/src/yunohost/data_migrations/0021_migrate_to_bullseye.py
index f83d79239..4cdec3f24 100644
--- a/src/yunohost/data_migrations/0021_migrate_to_bullseye.py
+++ b/src/yunohost/data_migrations/0021_migrate_to_bullseye.py
@@ -85,11 +85,11 @@ def _rebuild_venvs():
             os.system(f"python -m venv {venv}")
             status = os.system(f"bash -c 'source {venv}/bin/activate && pip install -r {venv}{VENV_REQUIREMENTS_SUFFIX} && deactivate'")
             if status != 0:
-                logger.warning(m18n.n("venv_regen_failed", venv=venv))
+                logger.warning(m18n.n("migration_0021_venv_regen_failed", venv=venv))
             else:
                 rm(venv + VENV_REQUIREMENTS_SUFFIX)
         else:
-            logger.warning(m18n.n("venv_regen_failed", venv=venv))
+            logger.warning(m18n.n("migration_0021_venv_regen_failed", venv=venv))
 
 
 class MyMigration(Migration):