Episode 8 of 'ANDOR' retconned how Cassian met K2-SO compared to the companion comic released in 2017, after 'ROGUE ONE' hit theaters. This is considered canon as it occurred after the Disney buy out.
As I get older, I find myself caring less and less about what is and isn't canon. A good story is a good story and as long as the writing is rock solid, they can change anything they want. People need to stop holding these stories so sacred.