Upgrade Django to v3.1.1
The compatibility import of django.core.exceptions.FieldDoesNotExist in django.db.models.fields is removed.
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Niyaz Batyrshin committed
15993dc649db6e30b6c71de43939674c65ac320e
Parent: 94dd398
The compatibility import of django.core.exceptions.FieldDoesNotExist in django.db.models.fields is removed.