How to fix Subversion «!» status

What happens after you run:

svn cleanup .
svn update
svn status

svn revert /path/to/file
svn rm /path/to/file      # if you want to delete it from svn itself

Golden rule is: once something is under svn-control, any moving, deleting, renaming, should be done with svn commands (svn mv, svn rm, etc.), not using normal filesystem/file-explorer functions.