You can get into the meat warehouse without the keycard

And it breaks everything.

Brother Tooth does not spawn and you can open the cell anyway. The mission becomes impossible to complete so you have to exit the instance (sleep) and reenter (sleep again) to revert back to a point where things aren’t broken.

As you can see, the mission is stuck on “Investigate the computer”, but I already did that and the doors are open, but Brother Tooth is nowhere to be found.