The issue has been resolved and I can continue updating. However, as direct feedback, I was advised to introduce new updates to a limited amount of people to test the stability of the update before allowing everyone to join. Ultimately reducing the chances of massive data corruption or any other data-breaking bug.
Anyone that wants to test today and tomorrow, please send me a message and I'll send you the password. The server is 100% guaranteed open to the public tomorrow night!
Worth noting is that data saved during these test periods is not rolled back. Meaning that you just get to play on the updated server earlier than anyone else.