diff --git a/synergy_scheduler_manager/quota_manager.py b/synergy_scheduler_manager/quota_manager.py
index cb27342..586431c 100644
--- a/synergy_scheduler_manager/quota_manager.py
+++ b/synergy_scheduler_manager/quota_manager.py
@@ -199,7 +199,6 @@ class QuotaManager(Manager):
                                  % (uuid, TTL, state, prj_id))
 
                     self.nova_manager.deleteServer(server)
-                    SharedQuota.release(server)
             except Exception as ex:
                 LOG.error(ex)
                 raise ex