update

dao/db.go

@@ -59,7 +59,7 @@ func (d *Dao) UserExist(userId, chatId int) (dbUser *dbModel.User, err error) {
 
 func (d *Dao) UpdateUserName(userId, chatId int, username, firstName, lastName string) (err error) {
 	return d.db.Model(&dbModel.User{}).
-		Where("user_id = ? AND chat_id = ? AND left_at IS NULL", userId, chatId).
+		Where("user_id = ? AND chat_id = ? AND first_name = ? AND last_name = ? AND left_at IS NULL", userId, chatId, firstName, lastName).
 		Update("username", username).Error
 }