SVN代码回滚失败 -Cannot merge into mixed-revision working copy [1308:1309]; try updating first

SVN回滚代码 正常状况通常都使用web svn merge -r r12:r11 . 这样来回滚代码，可是若是回滚过一次，而后:svg svn ci -m "ci" //version is 13 这样再次操做svn merge的时候就会报错：svn Cannot merge into mixed-revision working copy [1308:1309]; try updating

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