Behavior Change
Previous Behavior: During an error scenario where incorrect IMSI is used due to wrong TEID for the same UPF combo call, handover used to pass.
New Behavior: If IMSI mismatches during the same UPF combo call handover, then Handover Modify Request fails with offending IE Outer Header Creation (OHC).
Customer Impact: The customer will observe handover failure in the error scenario.