Added additional validation: you can't set verified to True if any pl* field is set to None
Added additional validation: you can't set verified to True if any pl* field is set to None

KlubJagiellonski/pola-backend,KlubJagiellonski/pola-backend,KlubJagiellonski/pola-backend,KlubJagiellonski/pola-backend