Do you have an example field where this is wrong? There's an override option which can be passed into the form helper to disable it, we just need to know which field(s) require it :)

I'm afraid we can just enforce required to be true. Looking to the code I see

required_mark = ' *' if is_required?(f, attr) || options[:required]

see https://github.com/theforeman/foreman/blob/develop/app/helpers/layout_helper.rb#L153 and https://github.com/theforeman/foreman/blob/develop/app/helpers/layout_helper.rb#L167 for more details.

I have no existing example since it's in form I'm currently working on for bonding.

something like

<%= text_f f, :attached_to, :help_inline => _("Identifier of the interface to which this interface belongs, e.g. eth1") %>

adding :required => false does not help obviously since is_required?(f, attr) is always true

Indeed, that should use options[:required] unless it's nil, and only then fall back to is_required.

Yup, will send a PR shortly. I thought it would be also useful to make is_required? aware of conditions and if some is present, return false (probably makes sense in most cases?). Thoughts?

Sounds good!