Before this commit
==================
In certain scenarios, when a new subsequent payment was initiated after the
initial payment was completed, an error message appeared stating,
**Payment is canceled due to inactivity**
Issue
=====
Failing to remove the previous inactivity timeout before establishing a new
one led to the aforementioned error.
With this commit
================
Explicitly clear previous timeouts before setting a new one to prevent potential
conflicts and ensure a clean timeout environment.
closesodoo/odoo#156430
Signed-off-by: Quentin Lejeune (qle) <qle@odoo.com>