Required checkbox in conditional groups issue

Hi,

I have required checkbox inside conditional groups, and it still display a validation error message.

Here is the code:

[group assoc_solo]
[checkbox* checkbox-1 “Acceptance text AAAA”]
[/group]

[group conf_solo]
[checkbox* checkbox-2 “Acceptance text BBBB”]
[/group]

[group assoc_conf]
[checkbox* checkbox-3 “Acceptance text CCCC”]
[/group]

Many thanks for your help