Since 5b375d6 `viewed_slides` are now
stored in a set. This is causing issues post migrations because people
still had the list format in their sessions, and this results in a crash
when `.add()` is called on the list.
While deleting the sessions would likely solve the issues, this fix will
spare some troubles for people migrating in the future.
via p/feedback
closesodoo/odoo#99954
Signed-off-by: Florian Charlier (flch) <flch@odoo.com>
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>
Arnaud Baes
84d17e57e8