diff --git a/core/subscriber_manager.go b/core/subscriber_manager.go
index 717c323..5610d2c 100644
--- a/core/subscriber_manager.go
+++ b/core/subscriber_manager.go
@@ -31,6 +31,7 @@
 const (
 	SUBSCRIBER_PROVISION_SUCCESS = iota
 	TP_INSTANCE_CREATION_FAILED
+	FLOW_ID_GENERATION_FAILED
 	FLOW_ADD_FAILED
 	SCHED_CREATION_FAILED
 	QUEUE_CREATION_FAILED
@@ -43,6 +44,7 @@
 var Reason = [...]string{
 	"SUBSCRIBER_PROVISION_SUCCESS",
 	"TP_INSTANCE_CREATION_FAILED",
+	"FLOW_ID_GENERATION_FAILED",
 	"FLOW_ADD_FAILED",
 	"SCHED_CREATION_FAILED",
 	"QUEUE_CREATION_FAILED",