diff --git a/src/spaceone/monitoring/service/event_rule_service.py b/src/spaceone/monitoring/service/event_rule_service.py
index 83e174c..7ac43dd 100644
--- a/src/spaceone/monitoring/service/event_rule_service.py
+++ b/src/spaceone/monitoring/service/event_rule_service.py
@@ -464,7 +464,7 @@ def _check_recursive_actions(
             )
             raise ERROR_INVALID_PARAMETER(
                 key="actions.change_project",
-                reason=f"The {change_project_id} in the action should be different from the project_id in the event rule.",
+                reason=f"To avoid an infinite loop, the change_project_id({change_project_id}) in the action must differ from the project_id in the event rule.",
             )
 
         visited_project_ids.append(change_project_id)