Gitlab 7.4.3 Fork Failed

In CE 7.3.2 and now 7.4.3, there is a specific repository that is unable to be forked, regardless of who is trying to fork it. The error message received is:

Fork Error!

You tried to fork / but it failed for the following reason: – Fork transaction failed.

There are database records for the forked project in both the forked_project_links and projects tables, but the record in projects indicates a size of zero.