Is a prisoner entitled to relief on a habeas corpus claim that would not necessarily lead to an immediate or speedier release?

A prisoner's claim which, if successful, would not necessarily lead to immediate or speedier release falls outside the "core of habeas corpus" and must be pursued in an action brought pursuant to 42 U.S.C. 1983. Nettles v. Grounds, 830 F.3d 922 (9th Cir. 2016). Here, success on petitioner's due process claim would not necessarily lead to his immediate or speedier release. At best, it could result in the advancement of his next nonviolent parole suitably hearing. For this reason alone, petitioner is not entitled to relief.