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Previously, if the AMF received an smf-select-data response (or related SBI messages) from the NUDM-SDM after the UE context had been released, the GMM state machine would hit an unhandled event and abort with a fatal assertion. This commit adds a new case for OGS_SBI_SERVICE_NAME_NUDM_SDM in gmm_state_exception(), explicitly ignoring SBI messages for AM_DATA, SMF_SELECT_DATA, UE_CONTEXT_IN_SMF_DATA, and SDM_SUBSCRIPTIONS (with a warning log). Any truly unexpected resource names now emit an error log instead of triggering assert_if_reached. As a result, the AMF will safely drop late NUDM-SDM responses without crashing.
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