No chants in my local database have a differentia_new value

[jacobdgm]

looking into #694, I discovered that none of the chants in my local database have a differentia_new value:

>>> from main_app.models import Chant
>>> w_diff_n = Chant.objects.filter(differentia_new__isnull = False)
>>> w_diff_n.first()
>>> w_diff_n.count()
0

We may need to update our data syncing scripts, as this value is evidently being missed.

[jacobdgm]

see also #693

[jacobdgm]

taking the database from Production and plugging it in locally, this seems not to be a problem. Not sure what was going on here, but it seems no longer to be a problem. Closing.

>>> from main_app.models import Chant
>>> Chant.objects.filter(differentia_new__isnull=False).count()
132128
>>> Chant.objects.filter(differentia__isnull=False).count()
176892