diff --git a/locales/en.json b/locales/en.json
index 5c3595782..3e1054069 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -346,7 +346,7 @@
     "migration_0011_can_not_backup_before_migration": "The backup of the system before the migration failed. Migration failed. Error: {error:s}",
     "migration_0011_create_group": "Creating a group for each user…",
     "migration_0011_done": "Migration successful. You are now able to manage usergroups.",
-    "migration_0011_LDAP_config_dirty": "It look like that you customized your LDAP configuration. For this migration the LDAP configuration needs to be updated.\nYou need to save your current configuration, reintialize the original configuration by running 'yunohost tools regen-conf -f' and retry the migration",
+    "migration_0011_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_0011_LDAP_update_failed": "Could not update LDAP. Error: {error:s}",
     "migration_0011_migrate_permission": "Migrating permissions from apps settings to LDAP…",
     "migration_0011_migration_failed_trying_to_rollback": "Migration failed… trying to roll back the system.",
diff --git a/src/yunohost/data_migrations/0011_setup_group_permission.py b/src/yunohost/data_migrations/0011_setup_group_permission.py
index ae5a8bfb9..de28a3ad7 100644
--- a/src/yunohost/data_migrations/0011_setup_group_permission.py
+++ b/src/yunohost/data_migrations/0011_setup_group_permission.py
@@ -9,7 +9,7 @@ from moulinette.utils.filesystem import read_yaml
 from yunohost.tools import Migration
 from yunohost.user import user_group_create, user_group_update
 from yunohost.app import app_setting, app_list
-from yunohost.regenconf import regen_conf
+from yunohost.regenconf import regen_conf, BACKUP_CONF_DIR
 from yunohost.permission import permission_create, user_permission_update, permission_sync_to_user
 
 logger = getActionLogger('yunohost.migration')
@@ -130,7 +130,7 @@ class MyMigration(Migration):
         ldap_regen_conf_status = regen_conf(names=['slapd'], dry_run=True)
         # By this we check if the have been customized
         if ldap_regen_conf_status and ldap_regen_conf_status['slapd']['pending']:
-            raise YunohostError("migration_0011_LDAP_config_dirty")
+            logger.warning("migration_0011_slapd_config_will_be_overwritten", conf_backup_folder=BACKUP_CONF_DIR)
 
         # Backup LDAP and the apps settings before to do the migration
         logger.info(m18n.n("migration_0011_backup_before_migration"))