Values.UnmodifiableEntityExceptionSourceThe request was rejected because service-linked roles are protected Amazon Web Services resources. Only the service that depends on the service-linked role can modify or delete the role on your behalf. The error message includes the name of the service that depends on this service-linked role. You must request the change through that service.
val to_value :
t ->
[> `Structure of (string * [> `String of UnmodifiableEntityMessage.t ]) list ]