我尝试升级存储库以允许合并信息/合并跟踪支持
svn: E200007: Retrieval of mergeinfo unsupported by 'svn+ssh://server/repo'
我shell进入SVN服务器，然后运行：
svnadmin upgrade ./repos/svn /
Repository lock acquired.
Please wait; upgrading the repository may take some time...
svnadmin: E000017: Can't open file 'repos/svn/db/min-unpacked-rev': File exists
命令以root身份运行; {<1}}由root拥有