My Aternos server create a second world

i was playing in my server with any issues, but the next day i don't know if there was an error or whatever but the server has create a new world, and i can't download the previous to change it, i don't have a backup to download neither, someone can tell me what happen ?, and a way to solve it ?

i was playing in the forge 1.16.5 [36.2.20]

Quote from Julian

What's your server address?

Triwea_Mundo_3.aternos.me:35585

Quote from Julian

It looks like the world name in your server.properties was reset.
I changed it back to the name of your other world, please check if that solved the problem

thanks man, its all good now