I accidentally deleted a folder in SVN and added it back immediately. I ran into an issue with this and my solution ended up removing the folder completely from my local copy as
I had a similar problem. I ended up nuking it from orbit, and lost my SVN history in the process. But at least I made that damn error go away.
This is probably a sub-optimal sequence of commands to execute, but it should fairly closely follow the sequence of commands that I actually did to get things to work:
cp -rp target ~/other/location/target-20111108
svn rm target --force
cp -rp ~/other/location/target-20111108 target-other-name
cd target-other-name
find . -name .svn -print | xargs rm -rf
cd ..
svn add target-other-name
svn ci -m "Re-re-re-re-re-re-re-re-re-re import target"
svn mv target-other-name target
svn ci -m "Re-re-re-re-re-re-re-re-re-re import target"