diff --git a/proto/spaceone/api/alert_manager/v1/event.proto b/proto/spaceone/api/alert_manager/v1/event.proto
index 2746d9a0..4d148313 100644
--- a/proto/spaceone/api/alert_manager/v1/event.proto
+++ b/proto/spaceone/api/alert_manager/v1/event.proto
@@ -37,7 +37,6 @@ message EventInfo {
         EVENT_TYPE_NONE = 0;
         ALERT = 1;
         RECOVERY = 2;
-        ERROR = 3;
     }
 
     string event_key = 1;