Steps to reproduce: - Install base_automation_hr_contract and helpdesk - Setup two automation rules with model "Helpdesk Ticket" and "On incoming message" as trigger - Create a ticket in helpdesk Issues: Traceback is shown because `_message_post` doesn't have the origin attributes. This is due to the closure being wrong as explained here: https://github.com/odoo/odoo/blob/e2ad568e6cd4de2d721149eb76d04f58c8510191/addons/base_automation/models/base_automation.py#L686-L691 Solution: Encapsulate the `_message_post` function definition, so that each times we patch message_post we patch it with a new function. This wasn't the case before since `_message_post` wasn't isolated. This solution is similar to the other method patched. https://github.com/odoo/odoo/blob/e2ad568e6cd4de2d721149eb76d04f58c8510191/addons/base_automation/models/base_automation.py#L711-L734 opw-3758851 closes odoo/odoo#155596 Signed-off-by: Raphael Collet <rco@odoo.com>