When Time Machine tries to make a backup, it informs me that it can't because the backup disk is full.
What it's mostly full of (about 700GB of 1TB) is prior backups of the same machine. Time Machine used to just delete the oldest ones, but now it seems unwilling or unable to do so.
Is there some manual way I can make room by clearing out old backups? When I go into the Time Capsule through Finder, the backups all appear to be in a sparse bundle, which I'm nervous to mess with.