fix 2

pkg/model/approval_copy.go

@@ -20,7 +20,7 @@ type ApprovalCopy struct {
 func BatchCopySave(users CopyUsers, approvalId uint64) error {
 	var insertRaws []*ApprovalCopy
 
-	if users == nil && len(users) == 0 {
+	if users == nil || len(users) == 0 {
 		return nil
 	}