Why the exception VersionError is raised for invalid value in hidden field "version" in forms?

[tomas-zemres]

When we run security scans on the form that uses "django-concurrency form"
then the logs are polluted with messages like:
ERROR (django.security.VersionError) -5 OR 425=(SELECT 709 FROM PG_SLEEP(15))
ERROR (django.security.VersionError) ... or other non numer values ...

Why is not called "super().to_python(...)" in VersionField.to_python so that Integer validation is applied there?
the exception VersionError is raised instead for all non-numeric values there:

django-concurrency/src/concurrency/forms.py

Line 123 in f94fcf7

raise VersionError(value)

Why is not raised ValidationError there (as for other invalid fields)?

[domdinicola]

@tomas-zemres what do you think about the related PR?