修改日志时遇到以下错误：

Repository has not been enabled to accept revision propchanges;
ask the administrator to create a pre-revprop-change hook

解决办法如下：

同一，在某个库的属性页面的Hooks选项卡下找到Pre-revision property change hook，双击修改其内容。

SET REPOS="%1"
SET REV="%2"
SET USER="%3"
SET PROPNAME="%4"
SET ACTION="%5"
IF %ACTION% == "M" (IF %PROPNAME% == "svn:log" (EXIT 0))
ECHO "Changing revision properties %PROPNAME% is prohibited" >&2
EXIT 1

应用就可以了。