diff --git a/internal/sbi/producer/ue_context_management.go b/internal/sbi/producer/ue_context_management.go
index 5fff6aa..4fafc03 100644
--- a/internal/sbi/producer/ue_context_management.go
+++ b/internal/sbi/producer/ue_context_management.go
@@ -675,7 +675,7 @@ func RegistrationSmfRegistrationsProcedure(request *models.SmfRegistration, ueID
 	pduID32 := int32(pduID64)
 
 	var createSmfContextNon3gppParamOpts Nudr_DataRepository.CreateSmfContextNon3gppParamOpts
-	optInterface := optional.NewInterface(request)
+	optInterface := optional.NewInterface(*request)
 	createSmfContextNon3gppParamOpts.SmfRegistration = optInterface
 
 	clientAPI, err := createUDMClientToUDR(ueID)
@@ -686,7 +686,6 @@ func RegistrationSmfRegistrationsProcedure(request *models.SmfRegistration, ueID
 	resp, err := clientAPI.SMFRegistrationDocumentApi.CreateSmfContextNon3gpp(context.Background(), ueID,
 		pduID32, &createSmfContextNon3gppParamOpts)
 	if err != nil {
-		problemDetails.Cause = err.(openapi.GenericOpenAPIError).Model().(models.ProblemDetails).Cause
 		problemDetails = &models.ProblemDetails{
 			Status: int32(resp.StatusCode),
 			Cause:  err.(openapi.GenericOpenAPIError).Model().(models.ProblemDetails).Cause,