diff --git a/model/user_charges.go b/model/user_charges.go
index fd9af00..a157bab 100644
--- a/model/user_charges.go
+++ b/model/user_charges.go
@@ -8,7 +8,7 @@ import (
 
 type UserCharge struct {
 	Created     `xorm:"extends"`
-	Seq         int64               `xorm:"bigint pk not null" json:"seq"`
+	Seq         int64               `xorm:"bigint pk not null autoincr" json:"seq"`
 	UserId      string              `xorm:"varchar(120) not null" json:"userId"`
 	Fee         decimal.NullDecimal `xorm:"numeric(12,2)" json:"fee"`
 	Discount    decimal.NullDecimal `xorm:"numeric(5,4)" json:"discount"`
diff --git a/service/charge.go b/service/charge.go
index 1142d19..c1e3164 100644
--- a/service/charge.go
+++ b/service/charge.go
@@ -5,7 +5,6 @@ import (
 	"electricity_bill_calc/global"
 	"electricity_bill_calc/model"
 	"electricity_bill_calc/repository"
-	"electricity_bill_calc/utils"
 	"time"
 
 	"xorm.io/builder"
@@ -17,25 +16,25 @@ type _ChargeService struct{}
 var ChargeService _ChargeService
 
 func (c _ChargeService) CreateChargeRecord(charge *model.UserCharge, extendWithIgnoreSettle bool) error {
-	var seqs = make([]int64, 0)
-	err := global.DBConn.Table(&model.UserCharge{}).Cols("seq").Find(&seqs)
-	if err != nil {
-		return err
-	}
-	maxSeq := utils.Reduce(seqs, 0, func(acc, elem int64) int64 {
-		if elem > acc {
-			return elem
-		} else {
-			return acc
-		}
-	})
+	// var seqs = make([]int64, 0)
+	// err := global.DBConn.Table(&model.UserCharge{}).Cols("seq").Find(&seqs)
+	// if err != nil {
+	// 	return err
+	// }
+	// maxSeq := utils.Reduce(seqs, 0, func(acc, elem int64) int64 {
+	// 	if elem > acc {
+	// 		return elem
+	// 	} else {
+	// 		return acc
+	// 	}
+	// })
 	tx := global.DBConn.NewSession()
 	defer tx.Close()
 	if err := tx.Begin(); err != nil {
 		return err
 	}
-	charge.Seq = maxSeq + 1
-	_, err = tx.Insert(charge)
+	charge.Seq = 0
+	_, err := tx.Insert(charge)
 	if err != nil {
 		tx.Rollback()
 		return err