Merge PR #885 into 12.0

Signed-off-by pedrobaeza

partner_industry_secondary/models/res_partner.py

@@ -17,7 +17,8 @@ class ResPartner(models.Model):
 
     @api.constrains('industry_id', 'secondary_industry_ids')
     def _check_industries(self):
-        if self.industry_id in self.secondary_industry_ids:
+        for partner in self:
+            if partner.industry_id in partner.secondary_industry_ids:
                 raise exceptions.ValidationError(
                     _('The main industry must be different '
                       'from the secondary industries.'))