</group>
<group>
<field name="nb_register"/>
- <field name="user_id" attrs="{'readonly':[('state','!=', 'draft')]}"/>
+ <field name="user_id" attrs="{'readonly':[('state','!=', 'draft')]}" context="{'default_groups_ref': ['base.group_user', 'base.group_partner_manager', 'event.group_event_user']}"/>
</group>
<group groups="base.group_no_one">
<field name="create_date"/>