I found very nice solution, that SOLVED my problem. The trick is to edit the svn DB (wc.db).
The solution is described on this page : http://www.exchangeconcept.com/2015/01/svn-e155037-previous-operation-has-not-finished-run-cleanup-if-it-was-interrupted/
If link is down, just look and follow this instructions:
I used sqlite tool from http://sqlitebrowser.org/.