So I just noticed that "Taggable" and "Blameable" are behaviors listed in behaviors. My project is setup as a Doctrine 1 project and these behaviors are not supported. In fact, if someone selects a behavior that is not supported, it will cause issues with the code base that tries to implement a behavior that it does not recognize. I labeled this a bug because it will actually break peoples ability to use output from your application if they mistakenly used a behavior for Doctrine 1 they were not aware was only supported in Doctrine 2.