diff --git a/src/main/java/com/actiontech/dble/backend/heartbeat/MySQLDetector.java b/src/main/java/com/actiontech/dble/backend/heartbeat/MySQLDetector.java
index 54f545184..2526145a7 100644
--- a/src/main/java/com/actiontech/dble/backend/heartbeat/MySQLDetector.java
+++ b/src/main/java/com/actiontech/dble/backend/heartbeat/MySQLDetector.java
@@ -153,7 +153,12 @@ public class MySQLDetector implements SQLQueryResultListener<SQLQueryResult<Map<
                 } else if (variables.isLowerCase() != DbleServer.getInstance().getSystemVariables().isLowerCaseTableNames()) {
                     errMsg = "this dbInstance[=" + url + "]'s lower_case is wrong";
                 } else if (versionMismatch) {
-                    errMsg = "this dbInstance[=" + url + "]'s version[=" + variables.getVersion() + "] cannot be lower than the dble version[=" + SystemConfig.getInstance().getFakeMySQLVersion() + "]";
+                    if (!source.getDbGroup().isRwSplitUseless()) {
+                        //rw-split
+                        errMsg = "the dble version[=" + SystemConfig.getInstance().getFakeMySQLVersion() + "] and " + source.getDbGroupConfig().instanceDatabaseType().toString() + "[" + source.getConfig().getUrl() + "] version[=" + variables.getVersion() + "] not match, Please check the version.";
+                    } else {
+                        errMsg = "this dbInstance[=" + url + "]'s version[=" + variables.getVersion() + "] cannot be lower than the dble version[=" + SystemConfig.getInstance().getFakeMySQLVersion() + "],pls check the backend " + source.getDbGroupConfig().instanceDatabaseType() + " node.";
+                    }
                 } else {
                     errMsg = "this dbInstance[=" + url + "]'s max_allowed_packet is " + variables.getMaxPacketSize() + ", but dble's is " + SystemConfig.getInstance().getMaxPacketSize();
                 }
diff --git a/src/main/java/com/actiontech/dble/config/util/ConfigUtil.java b/src/main/java/com/actiontech/dble/config/util/ConfigUtil.java
index 7f24c2533..c7735dbd0 100644
--- a/src/main/java/com/actiontech/dble/config/util/ConfigUtil.java
+++ b/src/main/java/com/actiontech/dble/config/util/ConfigUtil.java
@@ -261,7 +261,7 @@ public final class ConfigUtil {
             //sharding or analysis
             boolean isMatch = majorVersion >= VersionUtil.getMajorVersion(SystemConfig.getInstance().getFakeMySQLVersion());
             if (!isMatch && isThrowException) {
-                throw new ConfigException("the dble version[=" + SystemConfig.getInstance().getFakeMySQLVersion() + "] cannot be higher than the minimum version of the backend " + type + " node,pls check the backend " + type + " node.");
+                throw new ConfigException("this dbInstance[=" + instance.getConfig().getUrl() + "]'s version[=" + version + "] cannot be lower than the dble version[=" + SystemConfig.getInstance().getFakeMySQLVersion() + "],pls check the backend " + type + " node.");
             }
             return isMatch;
         }
@@ -443,8 +443,8 @@ public final class ConfigUtil {
 
     public static void checkDbleAndMysqlVersion(List<ChangeItem> changeItemList, ConfigInitializer newConfigLoader) {
         List<ChangeItem> needCheckVersionList = changeItemList.stream()
-                //add dbInstance or add dbGroup or add shardingNode or (update dbInstance and need testConn) or (update rwSplitUser and affectEntryDbGroup=true) or update shardingNode
-                .filter(changeItem -> ((changeItem.getItemType() == ChangeItemType.PHYSICAL_DB_INSTANCE || changeItem.getItemType() == ChangeItemType.PHYSICAL_DB_GROUP || changeItem.getItemType() == ChangeItemType.SHARDING_NODE) && changeItem.getType() == ChangeType.ADD) ||
+                //add dbInstance/dbGroup/rwSplitUser/shardingNode or (update dbInstance and need testConn) or (update rwSplitUser and affectEntryDbGroup=true) or update shardingNode
+                .filter(changeItem -> (changeItem.getType() == ChangeType.ADD) ||
                         (changeItem.getItemType() == ChangeItemType.PHYSICAL_DB_INSTANCE && changeItem.getType() == ChangeType.UPDATE && changeItem.isAffectTestConn()) ||
                         (changeItem.getItemType() == ChangeItemType.USERNAME && changeItem.getType() == ChangeType.UPDATE && changeItem.isAffectEntryDbGroup()) ||
                         (changeItem.getItemType() == ChangeItemType.SHARDING_NODE && changeItem.getType() == ChangeType.UPDATE))
@@ -470,7 +470,7 @@ public final class ConfigUtil {
                 ShardingNode shardingNode = (ShardingNode) item;
                 PhysicalDbGroup dbGroup = shardingNode.getDbGroup();
                 checkDbGroupVersion(dbGroup);
-            } else if (changeItem.getItemType() == ChangeItemType.USERNAME && changeItem.isAffectEntryDbGroup()) {
+            } else if (changeItem.getItemType() == ChangeItemType.USERNAME) {
                 RwSplitUserConfig rwSplitUserConfig = (RwSplitUserConfig) newConfigLoader.getUsers().get(item);
                 PhysicalDbGroup dbGroup = newConfigLoader.getDbGroups().get(rwSplitUserConfig.getDbGroup());
                 checkDbGroupVersion(dbGroup);