fix scalar error

source/libs/executor/src/executorimpl.c

@@ -1696,7 +1696,7 @@ static int32_t doOpenAggregateOptr(SOperatorInfo* pOperator) {
     }
 
     // there is an scalar expression that needs to be calculated before apply the group aggregation.
-    if (pAggInfo->scalarExprSup.pExprInfo != NULL) {
+    if (pAggInfo->scalarExprSup.pExprInfo != NULL && !blockAllocated) {
       SExprSupp* pSup1 = &pAggInfo->scalarExprSup;
       code = projectApplyFunctions(pSup1->pExprInfo, pBlock, pBlock, pSup1->pCtx, pSup1->numOfExprs, NULL);
       if (code != TSDB_CODE_SUCCESS) {