diff --git a/xos/synchronizer/models/convenience/hippieossservice.py b/xos/synchronizer/models/convenience/hippieossservice.py
index 356d1f2..0959303 100644
--- a/xos/synchronizer/models/convenience/hippieossservice.py
+++ b/xos/synchronizer/models/convenience/hippieossservice.py
@@ -37,7 +37,6 @@
         # create an HippieOSSServiceInstance, the validation will be triggered in the corresponding sync step
         oss_si = self.stub.HippieOSSServiceInstance(
             serial_number=event["serial_number"],
-            uni_port_id=event["uni_port_id"],
             of_dpid=event["of_dpid"]
         )
         oss_si.save()