The pristine text with checksum '1fd3XXXXXX' was not found

SVN update中断，clear up代码时，报个ERROR：

Description : The pristine text with checksum '1fd3XXXXXX' was not found
Suggestion : The operation could not be completed.

Technical Information
=====================

      Error : V4Error
  Exception : ZSVNException

Causal Information
==================

将出错信息’1fd3XXXXXX’从SVN记录数据库wc.db中删除，重新update搞定。

具体操作：

1. 下载sqlite工具
地址：https://www.sqlite.com/download.html

2. 进入项目所在的根目录，找到.svn

3. 用下载的sqlite3打开记录数据库
sqlite3 .svn/wc.db

4. 查找sha1报错code是否存在版本库中
your missing pristine here = 1fd3XXXXXX（报错代码）
sqlite> select * from pristine where checksum="$sha1$your missing pristine here";

5. 执行上面的命令后查询结果为空，那么继续下面的操作
sqlite> select * from nodes where checksum="$sha1$your missing pristine here";

6. 查询有值，执行删除命令
sqlite> delete from nodes where checksum="$sha1$your missing pristine here";

7. 如果删除没有报错，SVN可以执行update操作了