This is the cake recipe Reb is pulling up.
Nobody in the Belt really knows why any more, but this is the traditional cake to bake when you wish to dispel suspicion that you are a malevolent AI. Yes, this is a thing that happens often enough that people have a traditional “I’m Not An Evil AI, No, Really” gift.
So I guess these are memories that the Rita instance in question dumped before self-destroying, and the new instance (taken from backup) had those memories as a result.
Pretty much!