i got this message because of cloning the svn repo with
--no-metadata option. Maybe that’s the case with Your problem too.
When cloning it without that option everything is fine.
--no-metadata option is meant to clone an SVN repository when the new
git clone is to be come the canonical source in the future. It lacks the capacity to commit back to the SVN upstream, because it has no way to track differences between the git clone and the SVN upstream.