diff --git a/cdc/scheduler/internal/v3/replication/replication_set.go b/cdc/scheduler/internal/v3/replication/replication_set.go
index 158fe527129..af6065db161 100644
--- a/cdc/scheduler/internal/v3/replication/replication_set.go
+++ b/cdc/scheduler/internal/v3/replication/replication_set.go
@@ -81,7 +81,7 @@ func (r ReplicationSetState) String() string {
 	case ReplicationSetStateRemoving:
 		return "Removing"
 	default:
-		return fmt.Sprintf("Unknown %d", r)
+		return "Unknown"
 	}
 }