diff --git a/src/parser/parser.yy b/src/parser/parser.yy
index 891de6951cf..00c2278c9b4 100644
--- a/src/parser/parser.yy
+++ b/src/parser/parser.yy
@@ -1449,7 +1449,6 @@ yield_column
     }
     | expression {
         if (graph::ExpressionUtils::checkVarExprIfExist($1)) {
-            delete $3;
             throw nebula::GraphParser::syntax_error(@1, "Direct output of variable is prohibited");
         }
         $$ = new YieldColumn($1);