Max Planck published the same paper in multiple journals in the 1940s, which was common practice at the time. He also published a second unrelated paper that happened to have the same title as the paper it was a response to. In 2011 both papers were retracted from their journals' archives, most likely because a bot incorrectly flagged them for plagiarism.

Saved you a click.

You missed the two absurdities:

1. Springer Nature are happily selling an empty PDF for $39.95.

2. Springer Nature responded that they’re not going to tell you why they retracted it, because retraction details are normally only shared with the author (who in this case died almost 80 years ago).