Before this commit, There would be a crash if the user tries to remove `website_company_id` from Website configuration as It is used in Backend. With this commit, we make `website_company_id` required if the Website is set. Fixes #47967 closes odoo/odoo#48175 X-original-commit: 940cc76ef3f301df91b60353e48cbaa5217bea93 Signed-off-by: Jérémy Kersten (jke) <jke@openerp.com>