Remove check on zip_id

models/res_partner.py

@@ -368,6 +368,10 @@ class ScopPartner(models.Model):
         on_delete='restrict',
         track_visibility='onchange')
 
+    @api.constrains('zip_id', 'country_id', 'city_id', 'state_id')
+    def _check_zip(self):
+        return
+
     @api.multi
     def open_facebook(self):
         self.ensure_one()