diff --git a/production.ini b/production.ini
--- a/production.ini
+++ b/production.ini
@@ -156,6 +156,11 @@ instance_id =
 ## handling that. Set this variable to 403 to return HTTPForbidden
 auth_ret_code =
 
+## locking return code. When repository is locked return this HTTP code. 2XX
+## codes don't break the transactions while 4XX codes do
+lock_ret_code = 423
+
+
 ####################################
 ###        CELERY CONFIG        ####
 ####################################