Django false-positive migration

models.py

from django.contrib.gis.db import models
from django.utils.translation import gettext_lazy as _

def validate_is_true(value):
    if value is not True:
        raise ValidationError(validate_is_true.error_message)


validate_is_true.error_message = _("This field is required")

class Pledge(models.Model):
    consent = models.BooleanField(
        _("I agree to abide by the Prideraiser Terms of Service and Code of Conduct."),
        default=False,
        validators=[validate_is_true],
    )