diff --git a/src/gausskernel/cbb/instruments/statement/instr_statement.cpp b/src/gausskernel/cbb/instruments/statement/instr_statement.cpp
index 51d3a530e..176119bf2 100644
--- a/src/gausskernel/cbb/instruments/statement/instr_statement.cpp
+++ b/src/gausskernel/cbb/instruments/statement/instr_statement.cpp
@@ -129,8 +129,8 @@ bool check_statement_stat_level(char** newval, void** extra, GucSource source)
     List *l = split_levels_into_list(*newval);
 
     if (list_length(l) != STATEMENT_SQL_KIND) {
-        list_free_deep(l);
         GUC_check_errdetail("attr num:%d is error,track_stmt_stat_level attr is 2", l->length);
+        list_free_deep(l);
         return false;
     }