4teamwork/opengever.core — pull request #569 by phgross (2014-09-22 15:32:26+00:00)
Title: Referenceprefix manager: Made prefix-mappings of already delete objects removable.

This is a follow-up for the PR #https://github.com/4teamwork/opengever.core/pull/527. It shoud be possible to free a mapping for an already deleted object.

@deiferni please have a look.