SVN problem

Has anyone come across this? It’s happened to me twice:

$ svn mv bluebook-academic.csl bluebook-law_review.csl
A bluebook-law_review.csl
D bluebook-academic.csl

$ svn commit . -m "changed file name"
Deleting styles/bluebook-academic.csl
Adding styles/bluebook-law_review.csl
svn: Commit failed (details follow):
svn: COPY of bluebook-law_review.csl: 403 Forbidden
(https://svn.sourceforge.net)

Am obviously looking tor a workaround.

Bruce