Why did my skyblock base just reset? ATM6

So I was accepting the quest rewards blindly, and once I accepted them all I exited out of the book, and my whole base was gone, and I was back at the start. I still had my inventory. What did I do? How do I get my base back??

https://preview.redd.it/jkrpd1oxwikg1.png?width=1909&format=png&auto=webp&s=9c5b8acd8aaaf20302ae823289e3caad8f0be979

https://preview.redd.it/o469vyg2xikg1.png?width=1916&format=png&auto=webp&s=53c0c36a3d2c4edbb56605d71dce2ee5f300aa45