Hello,
I need to create an M2O field that only shows the user customers and not other partners. In earlier Odo versions I solved it this way and everything worked:

customer_id = fields.Many2one('res.partner', domain="['&', ('customer', '=', 'True'), ('is_company', '=', 'True')]", string='Customer')

For the current version of Odoo, I modified the code as follows:

customer_id = fields.Many2one('res.partner', domain="['&', ('customer_rank', '>', 0), ('is_company', '=', 'True')]", string='Customer')

While a module with this code can be installed and run, every time I try to upgrade, a critical error occurs that causes the server to stop working:

"Unknown field "res.partner.customer_rank" in domain of field 'customer_id' (['&', ('customer_rank', '>', 0), ('is_company', '=', 'True')])"

This error also occurs for the "supplier_rank" field. On the other hand, the "is_company" field works without any problems. 

Does anyone have an idea what the error might be and how to fix it? Any help would be very appreciated.