On Friday, March 29, two astronauts were supposed to conduct what would have become the first all female space walk, Christina Koch and Anne McClain. After her first space walk on March 22, Anne McClain decided that a medium space suit was more appropriate for her, and she requested that the assignment be changed. If the EVA suit had been configured in advance, it could have happened, but there wasn't time to make the swap.
How often does this kind of thing happen? Due to the potential historic nature of such a spacewalk, this one is much more well known than most, but I'm curious if this is a common occurrence to swap out astronauts for space walks based on the configuration of EVA suits.