Errors during python manage.py makemigrations metadata step

[Mpellet771]

I'm using Python 3.9 and following the steps and I keep getting this error set:

filing.Filing.is_error: (fields.E903) NullBooleanField is removed except for support in historical migrations.
HINT: Use BooleanField(null=True) instead.
filing.Filing.parse_complete: (fields.E903) NullBooleanField is removed except for support in historical migrations.
HINT: Use BooleanField(null=True) instead.
filing.Filing.parse_started: (fields.E903) NullBooleanField is removed except for support in historical migrations.
HINT: Use BooleanField(null=True) instead.
metadata.Group.headless: (fields.E903) NullBooleanField is removed except for support in historical migrations.
HINT: Use BooleanField(null=True) instead.
metadata.SchedulePart.is_shell: (fields.E903) NullBooleanField is removed except for support in historical migrations.
HINT: Use BooleanField(null=True) instead.
metadata.Variable.is_canonical: (fields.E903) NullBooleanField is removed except for support in historical migrations.
HINT: Use BooleanField(null=True) instead.

And here is a sample of the warnings I receive:

WARNINGS:
filing.Filing: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'.
HINT: Configure the DEFAULT_AUTO_FIELD setting or the AppConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'django.db.models.BigAutoField'.
metadata.Description: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'.
HINT: Configure the DEFAULT_AUTO_FIELD setting or the MetadataConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'django.db.models.BigAutoField'.
metadata.Group: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'.
HINT: Configure the DEFAULT_AUTO_FIELD setting or the MetadataConfig.default_auto_field attribute to point to a subclass of AutoField, e.g. 'django.db.models.BigAutoField'.
metadata.LineNumber: (models.W042) Auto-created primary key used when not defining a primary key type, by default 'django.db.models.AutoField'.

I'm not sure where to make these suggested changes or whether the errors are an indicator that I missed a step. Thanks.