Invalid key: UserExtend for enum AccessPackageRequestType

Describe the bug

If my program is attempting to get all access package assignment requests, and comes across a request that has Request Type "UserExtend" it will throw and exception with the error stated in the title.

This type has been documented as a supported type in AccessPackageAssignmentRequest, but is not implemented in the AccessPackageRequestType.

Expected behavior

When making the call to retrieve all access package requests, it should return all requests - of all types, and not throw an exception.

How to reproduce

Requirement: Have an access package request of type "UserExtend" and an initialized GraphServiceClient.

then execute the code:
access_package_requests= await graph_client.identity_governance.entitlement_management.assignment_requests.get()

SDK Version

1.5.3

Latest version known to work for scenario above?

No response

Known Workarounds

None. Enum type is not implemented.

Debug output

No response

Configuration

No response

Other information

No response