On Parole or the sessions which was later to become on parole was recorded in 1975 on united artists label but shelved because the label didnt believe it would be a commercial success or was unhappy with the material. A couple of years later and a change in personnel the band re - recorded those songs which then became the first Motorhead album. When Motorhead started making it big, United Artists jumped on the success of the band and released the 75 session as On Parole effectively the same album as the later release Motorhead. So no real need for it to be in the discography. Hope this makes some sense. Forget the rest of the gibberish on this thread lol Aside from MotorLaws comments who answered your question.