TIL: Defining a default value within register_post_meta drives you crazy if you no more aware of that you did it. It still persists, even if it is not in the database or the object cache.
Found out around an hour later … 🥲
Tag: Database
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Default value in register_post_meta
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Data recovery needed
Turns out: Deleting MySQL databases on a test server, which is replicated from AND to the main server, is not good …
At least I created a backup directly before.