diff --git a/source/libs/planner/src/planOptimizer.c b/source/libs/planner/src/planOptimizer.c
index e0af7880ee..a70a61d39a 100644
--- a/source/libs/planner/src/planOptimizer.c
+++ b/source/libs/planner/src/planOptimizer.c
@@ -3019,10 +3019,7 @@ static EDealRes mergeProjectionsExpr(SNode** pNode, void* pContext) {
 
 static int32_t mergeProjectsOptimizeImpl(SOptimizeContext* pCxt, SLogicSubplan* pLogicSubplan, SLogicNode* pSelfNode) {
   SLogicNode* pChild = (SLogicNode*)nodesListGetNode(pSelfNode->pChildren, 0);
-  if (false == ((SProjectLogicNode*)pChild)->ignoreGroupId) {
-    qError("internal error, child project output does not ignore group when merge projects");
-    return TSDB_CODE_PLAN_INTERNAL_ERROR;
-  } else {
+  if (((SProjectLogicNode*)pChild)->ignoreGroupId) {
     ((SProjectLogicNode*)pSelfNode)->inputIgnoreGroup = true;
   }
   SMergeProjectionsContext cxt = {.pChildProj = (SProjectLogicNode*)pChild, .errCode = TSDB_CODE_SUCCESS};