Since commit [1], we use base.main_company as default value for the address of the admin employee. This is not correct as base.main_company is referring to res.company model while address_id is expecting a res.partner id. This works in most default situations as id = 1 is the same for both res.company and res.partner, but not anymore in case we have merged the initial partner with another one. We should use base.main_partner instead of base.main_company. [1]:https://github.com/odoo/odoo/commit/c0ca736193df42814389151956eb07c28c77d18e closes odoo/odoo#100883 X-original-commit: 163167052cd904db2ca2ea4322469a066c095938 Signed-off-by: Kevin Baptiste <kba@odoo.com> Signed-off-by: Alex Thuyls (alt) <alt@odoo.com>