A background pass that summarises groups of related memories had been storing
those summaries as memories, where they answered questions instead of your own
notes. They no longer enter memory, the memories they had set aside come back,
and upgrading repairs an affected store on its own with a verified backup taken
first.

Also: memories can be dated to when they happened, a dated memory is findable
by its date without needing a recognised name, and slm doctor and the dashboard
now report whether your memories can actually be found.