diff --git a/Providers/FreeSql.Provider.PostgreSQL/Curd/PostgreSQLInsertOrUpdate.cs b/Providers/FreeSql.Provider.PostgreSQL/Curd/PostgreSQLInsertOrUpdate.cs
index 52e6bd4c4..3684d5d6d 100644
--- a/Providers/FreeSql.Provider.PostgreSQL/Curd/PostgreSQLInsertOrUpdate.cs
+++ b/Providers/FreeSql.Provider.PostgreSQL/Curd/PostgreSQLInsertOrUpdate.cs
@@ -58,7 +58,7 @@ namespace FreeSql.PostgreSQL.Curd
                 if (IdentityColumn != null && flagInsert) sql = insert.ToSql();
                 else
                 {
-                    var ocdu = new OnConflictDoUpdate<T1>(_tempPrimarys?.Length > 0 ? insert : insert.InsertIdentity());
+                    var ocdu = new OnConflictDoUpdate<T1>(_tempPrimarys == _table.Primarys ? insert.InsertIdentity() : insert);
                     ocdu._tempPrimarys = _tempPrimarys;
                     var cols = _table.Columns.Values.Where(a => _updateSetDict.ContainsKey(a.Attribute.Name) ||
                         _tempPrimarys.Contains(a) == false && a.Attribute.CanUpdate == true && a.Attribute.IsIdentity == false && _updateIgnore.ContainsKey(a.Attribute.Name) == false);