diff --git a/backend/domain/proxy.go b/backend/domain/proxy.go
index 2b0bdbb..e13dfc0 100644
--- a/backend/domain/proxy.go
+++ b/backend/domain/proxy.go
@@ -28,6 +28,7 @@ type ProxyUsecase interface {
 type ProxyRepo interface {
 	Record(ctx context.Context, record *RecordParam) error
 	UpdateByTaskID(ctx context.Context, taskID string, fn func(*db.TaskUpdateOne)) error
+	AcceptCompletion(ctx context.Context, req *AcceptCompletionReq) error
 	SelectModelWithLoadBalancing(modelName string, modelType consts.ModelType) (*db.Model, error)
 	ValidateApiKey(ctx context.Context, key string) (*db.ApiKey, error)
 }
diff --git a/backend/internal/proxy/repo/proxy.go b/backend/internal/proxy/repo/proxy.go
index 4b90d14..2a560fc 100644
--- a/backend/internal/proxy/repo/proxy.go
+++ b/backend/internal/proxy/repo/proxy.go
@@ -133,3 +133,23 @@ func (r *ProxyRepo) UpdateByTaskID(ctx context.Context, taskID string, fn func(*
 		return up.Exec(ctx)
 	})
 }
+
+func (r *ProxyRepo) AcceptCompletion(ctx context.Context, req *domain.AcceptCompletionReq) error {
+	return entx.WithTx(ctx, r.db, func(tx *db.Tx) error {
+		rc, err := tx.Task.Query().Where(task.TaskID(req.ID)).Only(ctx)
+		if err != nil {
+			return err
+		}
+
+		if err := tx.Task.UpdateOneID(rc.ID).
+			SetIsAccept(true).
+			SetCompletion(req.Completion).
+			Exec(ctx); err != nil {
+			return err
+		}
+
+		return tx.TaskRecord.Update().
+			Where(taskrecord.TaskID(rc.ID)).
+			SetCompletion(req.Completion).Exec(ctx)
+	})
+}
diff --git a/backend/internal/proxy/usecase/proxy.go b/backend/internal/proxy/usecase/proxy.go
index 22020e5..2a39f54 100644
--- a/backend/internal/proxy/usecase/proxy.go
+++ b/backend/internal/proxy/usecase/proxy.go
@@ -6,7 +6,6 @@ import (
 	"github.com/chaitin/MonkeyCode/backend/pkg/cvt"
 
 	"github.com/chaitin/MonkeyCode/backend/consts"
-	"github.com/chaitin/MonkeyCode/backend/db"
 	"github.com/chaitin/MonkeyCode/backend/domain"
 )
 
@@ -40,8 +39,5 @@ func (p *ProxyUsecase) ValidateApiKey(ctx context.Context, key string) (*domain.
 }
 
 func (p *ProxyUsecase) AcceptCompletion(ctx context.Context, req *domain.AcceptCompletionReq) error {
-	return p.repo.UpdateByTaskID(ctx, req.ID, func(ruo *db.TaskUpdateOne) {
-		ruo.SetIsAccept(true)
-		ruo.SetCompletion(req.Completion)
-	})
+	return p.repo.AcceptCompletion(ctx, req)
 }