or how to comment (your own code)[https://github.com/mozilla/zamboni/commit/4b9eabf1fecb28aea81e7633c2de5bc4281d8796#L0R166). 

According to (the model definition)[https://github.com/mozilla/zamboni/blob/master/mkt/monolith/models.py] I think we can now update this field to be optional.