To resolve the issue please perform the following:
- open regedit
- navigate to HKLM\Software\Apprecovery\Core\Repositories
Each subkey is representing a repository GUID. Please drill down each one, to find the Specification key, to verify that GUID belongs to the affected repository path.
- stop the Core service
- export the repository GUID to the file for backup purposes and delete it
- start the Core service
- go to Core console, More (...), Repositories. The affected repository should no longer be listed
- click on "Add existing DVM repository" and point it to the new location
