My world has the wrong generation.

I uploaded my world map to the aternos server, but errors occur

I get this error [06:08:40] [Silver Thread/ERROR]: There is no old_norse key in MapLike[{max_section:20,min_section:-4}]

she says the kernel is trying to generate a new world on top of the old one. because of this, problems with the landscape and water level are formed on my server. how can I fix this?

Quote from Roman

Where exactly is the world from?

Is it from a world generator, a website or from SP?

Does the issue persist if you disable the optimize option directly after uploading the world?

i made this world using world painter.

Quote from Roman

[…]

thank you, it helped!