Version Lock

It is possible for you as a player to lock your block palette to a certain version, with the /lock command, you will get this auto-completion, you can pick the version and execute the command.

Let's say you lock to version 1_16_5, the second you grab a moss block you will get a warning in the center of the screen, and a sound will be played, it won't block you from actually placing the block, but it is up to you if you want to use that block.