Terrapop asked about the possibility of altering or deleting preseeded categories in Discourse. Specifically, they inquired about renaming and reorganizing the Site Feedback, Staff, and Lounge categories, as well as deleting them or the Uncategorized category.
awesomerobot replied that it’s possible to delete or move all preseeded categories except Uncategorized. They also suggested that a recent error encountered during an upgrade might be related to search performance changes, but a recent commit might resolve the issue.
Terrapop thanked awesomerobot and confirmed that making changes to the categories, including Uncategorized, and then upgrading again was successful without encountering the same error.
You should be able to delete/move everything other than Uncategorized… the error you were getting on upgrade appears to be related to some recent search performance changes.
There was a commit made yesterday that sounds like it might help avoid the issue you ran into (I’m not a backend developer, just connecting the dots)
Thanks for “connecting the dots” and yes, I made changes to all of them again (despite Uncategorized) and another upgrade worked without the same error.