Before this commit:
While trying to duplicate a mailing contact within particular
mailing list, it throws an user error saysing that 'A mailing
contact cannot subscribe to the same mailing list multiple times.'
After this commit:
User can duplicate a mailing contact from a mailing list without
the user error. In this case, we simply remove the default_list_ids
from the context, because all the mailing lists will be simply be
copied over from the existing contact and so we don't have to
re-add the default ones.
closesodoo/odoo#67094
Task-id: 2431344
X-original-commit: b92ebf3a47b7b1263669ac020ac8c213027400ea
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>