[2022] Can you lower the sea level?

Hello everyone,

I started to play eco with to friends of mine and we messed up the pollution settings while creating the server. If you would drive with the steam truck 3 times, the sea level would rise by 2 blocks.

Now we fixed the settings for the pollurion, but we couldnt find a way to lower the sea level back to normal. Is there anything we can do? We dont want to start a new game.