Comment 3 for bug 1755131

> We should not change the django behavior of 'required' check. It is better to explore a way to show an asterisk mark for "swit hed" conditional field (with required=False).

If just show an asterisk mark, we need additional field clean method, like method 'clean_network'.
So, my initial idea was skipping the check or removing the error conditionally.
I will submit a patch first and consider your opinion.