This field is mainly used for record rules. We want to be sure that changes in the _search method don't crash the logic. Related PR: https://github.com/odoo/odoo/pull/121561 TT43572 closes odoo/odoo#132441 X-original-commit: fe07c6b405c536171cafa3c5a9e05a31049dd7ad Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>