diff --git a/pkg/orm/db.go b/pkg/orm/db.go
index dea8845f..2477b132 100644
--- a/pkg/orm/db.go
+++ b/pkg/orm/db.go
@@ -488,7 +488,7 @@ func (d *dbBase) InsertValue(q dbQuerier, mi *modelInfo, isMulti bool, names []s
 
 			lastInsertId, err := res.LastInsertId()
 			if err != nil {
-				DebugLog.Println("[WARN] return LastInsertId error:", err)
+				DebugLog.Println(ErrLastInsertIdUnavailable, ':', err)
 			}
 			return lastInsertId, nil
 		}
@@ -594,7 +594,7 @@ func (d *dbBase) InsertOrUpdate(q dbQuerier, mi *modelInfo, ind reflect.Value, a
 
 			lastInsertId, err := res.LastInsertId()
 			if err != nil {
-				DebugLog.Println("[WARN] return LastInsertId error:", err)
+				DebugLog.Println(ErrLastInsertIdUnavailable, ':', err)
 			}
 			return lastInsertId, nil
 		}
diff --git a/pkg/orm/db_mysql.go b/pkg/orm/db_mysql.go
index 0db26e5b..11665fb2 100644
--- a/pkg/orm/db_mysql.go
+++ b/pkg/orm/db_mysql.go
@@ -167,7 +167,7 @@ func (d *dbBaseMysql) InsertOrUpdate(q dbQuerier, mi *modelInfo, ind reflect.Val
 
 			lastInsertId, err := res.LastInsertId()
 			if err != nil {
-				DebugLog.Println("[WARN] return LastInsertId error:", err)
+				DebugLog.Println(ErrLastInsertIdUnavailable, ':', err)
 			}
 			return lastInsertId, nil
 		}
diff --git a/pkg/orm/db_oracle.go b/pkg/orm/db_oracle.go
index 91a30f81..5177fb89 100644
--- a/pkg/orm/db_oracle.go
+++ b/pkg/orm/db_oracle.go
@@ -153,7 +153,7 @@ func (d *dbBaseOracle) InsertValue(q dbQuerier, mi *modelInfo, isMulti bool, nam
 
 			lastInsertId, err := res.LastInsertId()
 			if err != nil {
-				DebugLog.Println("[WARN] return LastInsertId error:", err)
+				DebugLog.Println(ErrLastInsertIdUnavailable, ':', err)
 			}
 			return lastInsertId, nil
 		}
diff --git a/pkg/orm/orm.go b/pkg/orm/orm.go
index 895636b6..5d81c764 100644
--- a/pkg/orm/orm.go
+++ b/pkg/orm/orm.go
@@ -85,6 +85,8 @@ var (
 	ErrStmtClosed    = errors.New("<QuerySeter> stmt already closed")
 	ErrArgs          = errors.New("<Ormer> args error may be empty")
 	ErrNotImplement  = errors.New("have not implement")
+
+	ErrLastInsertIdUnavailable = errors.New("<Ormer> last insert id is unavailable")
 )
 
 // Params stores the Params