I was building an under water house on 1.16 months ago, and now that I have the back ups and everything with the google drive, i can reload the server to 1.16, but when i update the server to the version 1.17, all my blocks, my chests, and my items gets replaced and is annoying. I wanna update my server and keep what i was doing. I know the update is related to caves and that's why is replacing all my glass since the house is like a cave. but it is really annoying. I might keep playing on 1.16 until somebody gives me a hand with this.
Thanks for your time. 