I have company_id field in stock.location which is many2one. When I change the field type from many2one to many2many by inheriting the model in custom addon, it shows the following error- 

My code:

class Location(models.Model):
    _inherit = "stock.location"

    company_id = fields.Many2many("res.company", string='Company12345', required=True

The error:

TypeError: Type of related field stock.quant.company_id is inconsistent with stock.location.company_id - - -

Any idea?