The first error and what I did.
The second error and what I did.
An image of one of the results: Aluminium ore turning into red sandstone stairs.
These slime blocks were healing machines. Strangely, I had another healing machine I placed somewhere and it had just disappeared.
All of those TMs were aluminium ingots. The sashes and mail were Quick Balls and Ultra Balls. Not sure what the Eviolite was.
Also, a lot of the Pixelmon items had turned into the new TMs, and the first 50 or so TMs had turned into badges. Most Pokéballs turned into mail.
I'm just making sure I'm updating my server correctly.