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On Subversion Feature, we have added the option settings that allow modification of revision properties.

If you allow modification of revision properties, project members then will be able to revise and change commit related data, such as commit message, date, and author, after the submission of the commit. This option will be quite useful when you want to revise a commit message afterward or want to move a Subversion repository from another site by using a tool such as svnsync.