@Hal 9000 Can you remove the voice-overs of Mace Windu and Aayla Secura speaking when Rey fights Darth Sidious? It contradicts previously established lore in the pre-sequel trilogy canon, in which only Obi-Wan, Yoda, Qui-Gon, and Anakin knew how to become Force ghosts.
Here’s a question, how did Anakin know how to become a Force ghost anyway?
Well, this is obviously only a question once the prequels are factored in, as in 1983 one assumed that’s just what Jedi all do. I think the best answer would be that Obi-Wan and Yoda helped him.