[Bug]: Some optional fields do not have default values causing migrations to be generated again

[abhi1693]

NetBox access-list plugin version

v1.1.0

NetBox version

v3.2.7

Steps to Reproduce

python manage.py makemigrations netbox_acls

Expected Behavior

No new migrations should be generated

Observed Behavior

It is impossible to change a nullable field 'remark' on aclextendedrule to non-nullable without providing a default. This is because the database needs something to populate existing rows.
Please select a fix:
 1) Provide a one-off default now (will be set on all existing rows with a null value for this column)
 2) Ignore for now. Existing rows that contain NULL values will have to be handled manually, for example with a RunPython or RunSQL operation.
 3) Quit and manually define a default value in models.py.
Select an option: 

It is impossible to change a nullable field 'remark' on aclstandardrule to non-nullable without providing a default. This is because the database needs something to populate existing rows.
Please select a fix:
 1) Provide a one-off default now (will be set on all existing rows with a null value for this column)
 2) Ignore for now. Existing rows that contain NULL values will have to be handled manually, for example with a RunPython or RunSQL operation.
 3) Quit and manually define a default value in models.py.
Select an option: