How to deselect all entries in a 2many relationship

[hochstibe]

For example users and groups are connected with a many2many relationship.
When creating or editing a user, I can select or deselect the groups.

However, I cant deselect all groups (at least one is still active).

The same is for the one2many relationships (for example users to adresses on your demo page)

Do I miss something obvious? I can provide a minimal example, if required

[aminalaee]

I think a minimal example would be nice, but for M2M we just have HTML so using CTRL + click you can select or deselect as you want. But for the One-To-Many, I think it should be nullable and what happens is we create this select: A A

So any empty one is added automatically so you can select that to deselect.

[hochstibe]

Ctrl + click works. I thought I tried this... Thanks a lot for the quick reply and the great project :-)