King Daniel wrote:
New canon overwrites old. For example, once Star Trek: Enterprise started, Archer's Enterprise NX-01 was the first Enterprise, even though Sisko previously said the first Enterprise was Kirk's ship in "Trials and Tribble-ations"
This is actually not an issue of canon, but of continuity--and in this instance, there really isn't a conflict of either. Even with ENT, Kirk's Enterprise
remains the first Federation starship
to bear the name and the Starfleet registry NCC-1701, which makes the comment in "Trials and Tribble-ations" still perfectly valid. Archer's Enterprise
, on the other hand, was an Earth starship
that was decommissioned prior to the formation of the Federation.