@ -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.'))