Retcon:
Retroactive continuity is a literary device in which previously established information in a work of fiction is changed, ignored, or contradicted to suit the current story.
Called a “retcon” for short, it’s mostly seen in works of serial fiction, such as comics and television series. [TCK Publishing]
Noted in “Trump drops the pretense, labels Jan. 6 insurrectionists ‘we’,” Aaron Blake, WaPo:
In the intervening four years [since the January 6th, 2021 insurrection riot], though, Trump himself has expressed an increasing amount of sympathy for the rioters — not just for their humanity and purported legal persecution (he has repeatedly floated pardons), but also for their actions. He has clearly sought to retcon that day from one of national shame to one that is to be, in many ways, celebrated.