Unknown Forge Attribute On Vanilla Server

So I’m setting up a factions server with a lot of plugins. It was working perfectly fine with no errors until I installed the Earth map from here: https://earth.motfe.net/. After installing the map the console is constantly being spammed with “Ignoring unknown attribute ‘forge.swimSpeed’” over 10 times a second. Can this be fixed by deleting or editing a file to remove the attribute or is it just something I will need to deal with?

The data will be removed as it’s saved again, just, something you’ll have to live with for a period of time

For me it didn’t work, i still have the same problem and some of my farms aren’t working :frowning: