I have transformed Country field of CustomerUser into a list (see http://forums.otrs.org/viewtopic.php?f=61&t=7721#p30634).
But now I want it to be mandatory.
Of course I set the 'required' property to 1 for 'UserCountry' in the Map of Config.pm.
But this doesn't make it, because the creation of a new CustomerUser has '-' as default value for Country... which is a value!
I guess if I remove it from the list, the first element will do it instead... and all my CustomerUsers will be created with 'Afghanistan' as default

Finally my only question is the following:
Is it possible to have a list field with no default value, and how?
Regards,
HervE