Fix init hook problem, more checks

partner_multi_relation_parent/models/res_partner.py

@@ -32,7 +32,10 @@ class ResPartner(models.Model):
                     this.id, type_relation, old_parent_id
                 )
                 previous.unlink()
-            # create new relations
+            # create new relations only if all the needed partners are there
+            # for example if on create it failed this.id will be false or if it
+            # has no parent also would fail.
+            if this.id and parent_id:
                 par_rel_mod.create({
                     'left_partner_id': this.id,
                     'type_id': type_relation,