diff --git a/indexedDb/impl/dm/implementation.go b/indexedDb/impl/dm/implementation.go
index d23c1fe931a0e8aa4149dc7a286490d957aca93b..785384ecff50c8daa9a640fef98f39ea820e3cbb 100644
--- a/indexedDb/impl/dm/implementation.go
+++ b/indexedDb/impl/dm/implementation.go
@@ -368,6 +368,8 @@ func (w *wasmModel) receiveHelper(
 		copy(msgID[:], newMessage.MessageID)
 		uuid, errLookup := w.msgIDLookup(msgID)
 		if uuid != 0 && errLookup == nil {
+			jww.WARN.Printf("result undefined, but found"+
+				" duplicate? %d, %s", uuid, msgID)
 			return uuid, nil
 		}
 		return 0, errors.Errorf("uuid lookup failure: %+v", err)