Current behavior : When we try to add a member through channel's settings by clicking on "Add a line", a blank line is correctly added but can't be edited. Steps to reproduce : - Install Discuss - Go to channel settings - Try to add a member by clicking on "Add a line" Reason : Since commit 89eef4cdd419cc23cfb8d3e0af7a7115119549c2 , 'partner_id' field as been set to readonly because it doesn't make sense to edit the partner_id of a channel. However, this prevents the possibility of adding a member. ( diff : https://github.com/odoo/odoo/pull/75496/files#diff-d02eca5ffaa6b9765330a905661cd6cb917b92d851b473d459ee011bb2c5be3cR17 ). OPW-2677329 closes odoo/odoo#80326 X-original-commit: 9536f8ec556670f67939fdee825630e06d5b4808 Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>