Tag names are not updated

So for example if i create a tag, save it and import it into unity, then change it's name to something completely different either:
a: if it's from lower case to caps or vise versa (player <--> PLAYER) then if the original tag was called player it will stay as player
or b: if the name of the tag is changed completely (player --> sprite) a new animation is created instead of overwriting it