diff --git a/npm-packages/convex/src/server/impl/query_impl.ts b/npm-packages/convex/src/server/impl/query_impl.ts
index 896a655b9..fc08f6280 100644
--- a/npm-packages/convex/src/server/impl/query_impl.ts
+++ b/npm-packages/convex/src/server/impl/query_impl.ts
@@ -326,7 +326,8 @@ export class QueryImpl implements Query<GenericTableInfo> {
       return null;
     }
     if (first_two_array.length === 2) {
-      throw new Error("unique() query returned more than one result");
+      throw new Error(`unique() query returned more than one result: 
+ [${first_two_array[0]._id}, ${first_two_array[1]._id}, ...]`);
     }
     return first_two_array[0];
   }