[SEBA-110] Validation location

Change-Id: Idd155c05fa4cac5eb0733576c5c0fae74925e1ef
diff --git a/xos/synchronizer/event_steps/onu_event.py b/xos/synchronizer/event_steps/onu_event.py
index 64197d2..045198f 100644
--- a/xos/synchronizer/event_steps/onu_event.py
+++ b/xos/synchronizer/event_steps/onu_event.py
@@ -44,7 +44,8 @@
             # create an AttWorkflowDriverServiceInstance, the validation will be triggered in the corresponding sync step
             att_si = AttWorkflowDriverServiceInstance(
                 serial_number=event["serial_number"],
-                of_dpid=event["of_dpid"]
+                of_dpid=event["of_dpid"],
+                uni_port_id=event["uni_port_id"]
             )
             self.log.debug("onu.events: Created new AttWorkflowDriverServiceInstance", si=att_si)
         att_si.save()