The Panopticon/Relation between K9 Mark I and Mark 2?

According to K9 Mark I page and Mark 2 page, K9 Mark I somehow survived from his destruction in AUDIO: Imperiatrix and had further adventures. Later, this version of K9 regenerates into Mark 2.

But shouldn't we consider K9 Mark 2 has nothing to do with K9 Mark I? I mean, the only evidence supporting this idea is Bob Baker's Forum and there is no in-universe evidence.

According to our valid source policy, behind-the-scences informations can't be included in in-universe portion of the articles. I think relationship between Mark I and Mark 2 should be included only in behind the scenes section.