diff --git a/src/main/resources/sql/truncate_tables.sql b/src/main/resources/sql/truncate_tables.sql
index 5d4ca9848..00d3f2694 100644
--- a/src/main/resources/sql/truncate_tables.sql
+++ b/src/main/resources/sql/truncate_tables.sql
@@ -29,7 +29,8 @@ DELETE FROM complex_keyword_cfg;
 DELETE FROM ddos_ip_cfg;
 DELETE FROM dns_domain_cfg;
 DELETE FROM dns_ip_cfg;
-DELETE FROM dns_res_strategy WHERE cfg_id <> 0;
+DELETE FROM dns_res_strategy;
+ALTER  TABLE  dns_res_strategy  auto_increment = 101
 DELETE FROM file_digest_cfg;
 DELETE FROM ftp_keyword_cfg;
 DELETE FROM http_body_cfg;