diff --git a/tests/army/frame/caseBase.py b/tests/army/frame/caseBase.py
index e527eae013..98007c6d8d 100644
--- a/tests/army/frame/caseBase.py
+++ b/tests/army/frame/caseBase.py
@@ -448,6 +448,7 @@ class TBase:
             dbName = db["dbinfo"]["name"]        
             stbs   = db["super_tables"]
             for stb in stbs:
+                stbName        = stb["name"]
                 child_count    = stb["childtable_count"]
                 insert_rows    = stb["insert_rows"]
                 timestamp_step = stb["timestamp_step"]
@@ -455,14 +456,14 @@ class TBase:
                 # check result
 
                 # count
-                sql = f"select count(*) from {db}.{stb}"
+                sql = f"select count(*) from {dbName}.{stbName}"
                 tdSql.checkAgg(sql, child_count * insert_rows)
                 # diff
-                sql = f"select * from (select diff(ts) as dif from {db}.{stb} partition by tbname) where dif != {timestamp_step};"
+                sql = f"select * from (select diff(ts) as dif from {dbName}.{stbName} partition by tbname) where dif != {timestamp_step};"
                 tdSql.query(sql)
                 tdSql.checkRows(0)
                 # show 
-                tdLog.info(f"insert check passed. db:{db} stb:{stb} child_count:{child_count} insert_rows:{insert_rows}\n")
+                tdLog.info(f"insert check passed. db:{dbName} stb:{stbName} child_count:{child_count} insert_rows:{insert_rows}\n")
 
     # tmq
     def tmqBenchJson(self, jsonFile, options="", checkStep=False):
diff --git a/tests/army/tools/benchmark/basic/insertBasic.py b/tests/army/tools/benchmark/basic/insertBasic.py
index 9cf7a515cf..dfc5e3aff1 100644
--- a/tests/army/tools/benchmark/basic/insertBasic.py
+++ b/tests/army/tools/benchmark/basic/insertBasic.py
@@ -120,7 +120,7 @@ class TDTestCase(TBase):
 
     def checkInsertManyStb(self):
         # many stb
-        self.benchInsert("./tools/benchmark/basic/json/insertManyStb.json", "", True)
+        self.benchInsert("./tools/benchmark/basic/json/insertManyStb.json")
     
     def run(self):
         benchmark = frame.etool.benchMarkFile()
diff --git a/tests/army/tools/benchmark/basic/json/insertManyStb.json b/tests/army/tools/benchmark/basic/json/insertManyStb.json
index f00308da23..caa418c858 100644
--- a/tests/army/tools/benchmark/basic/json/insertManyStb.json
+++ b/tests/army/tools/benchmark/basic/json/insertManyStb.json
@@ -22,10 +22,10 @@
                     "child_table_exists": "no",
                     "childtable_count": 2,
                     "insert_rows": 1000,
-                    "childtable_prefix": "d",
+                    "childtable_prefix": "da",
                     "insert_mode": "stmt",
                     "timestamp_step": 15,
-                    "start_timestamp":1700000000000000000,
+                    "start_timestamp":1700000000000000,
                     "columns": [
                         { "type": "double",      "name": "dc",  "max": 10, "min": 0 },
                         { "type": "tinyint",     "name": "ti",  "max": 100, "min": -100 },
@@ -41,11 +41,11 @@
                     "child_table_exists": "no",
                     "childtable_count": 3,
                     "insert_rows": 100,
-                    "childtable_prefix": "d",
+                    "childtable_prefix": "db",
                     "insert_mode": "stmt",
                     "timestamp_step": 20,
                     "interlace_rows": 1,
-                    "start_timestamp":1700000000000000000,
+                    "start_timestamp":1700000000000000,
                     "columns": [
                         { "type": "double",      "name": "dc",  "max": 10, "min": 0 },
                         { "type": "tinyint",     "name": "ti",  "max": 100, "min": -100 },
@@ -61,11 +61,11 @@
                     "child_table_exists": "no",
                     "childtable_count": 5,
                     "insert_rows": 100,
-                    "childtable_prefix": "d",
+                    "childtable_prefix": "dc",
                     "insert_mode": "stmt2",
                     "timestamp_step": 20,
                     "interlace_rows": 1,
-                    "start_timestamp":1700000000000000000,
+                    "start_timestamp":1700000000000000,
                     "columns": [
                         { "type": "double",      "name": "dc",  "max": 10, "min": 0 },
                         { "type": "tinyint",     "name": "ti",  "max": 100, "min": -100 },
@@ -81,11 +81,11 @@
                     "child_table_exists": "no",
                     "childtable_count": 2,
                     "insert_rows": 70,
-                    "childtable_prefix": "d",
+                    "childtable_prefix": "dd",
                     "insert_mode": "stmt2",
                     "timestamp_step": 50,
                     "interlace_rows": 0,
-                    "start_timestamp":1700000000000000000,
+                    "start_timestamp":1700000000000000,
                     "columns": [
                         { "type": "double",      "name": "dc",  "max": 10, "min": 0 },
                         { "type": "tinyint",     "name": "ti",  "max": 100, "min": -100 },
@@ -111,7 +111,7 @@
                     "child_table_exists": "no",
                     "childtable_count": 3,
                     "insert_rows": 120,
-                    "childtable_prefix": "d",
+                    "childtable_prefix": "de",
                     "insert_mode": "taosc",
                     "timestamp_step": 15,
                     "start_timestamp":1700000000000000000,
@@ -130,7 +130,7 @@
                     "child_table_exists": "no",
                     "childtable_count": 2,
                     "insert_rows": 200,
-                    "childtable_prefix": "d",
+                    "childtable_prefix": "df",
                     "insert_mode": "taosc",
                     "timestamp_step": 2,
                     "interlace_rows": 4,