Yup... but the headline is still very clickbaity! In the end it turns out they didn't delete a game, they deduplicated it (i.e. deleted a game that was listed as a separate version, but was actually identical to the original), and they didn't do it accidentally, but on purpose.
without any experience in emulation or software preservation i still really enjoyed the post.
i was waiting in suspense for the author to make a mistake and was so relieved when i saw they did not. when they were talking about the socket i was thinking "oh no, they must have cracked something"...
Edit: I changed it to "I accidentally deleted a bad game revision from MAME" for now - is that accurate enough?