I wanted to update my map called Flat Earth Apocalypse, just to raise the water of it, but I realized that if I raise the water, I'll need to save the map using the game editor. If I save using the game editor, the background will become transparent since 3.8. And all transparent background maps (all maps saved by WA since 3.8) are not supported ON WMDB. That's why I cannot update my map here. The background will become a solid black if you try to play the game.
Maybe the only way to upload a map here with a different flooding water is by uploading to TUS with black background (not transparent), using TUS map editor to change the water level, downloading it from TUS and then uploading it to WMDB.