Maps show Stone Pattern when created

Sorry for the incovenience,

Certains maps of Chunks that were, I believe, used during the 20w17a snapshot show stone patterns on them as stated on this Mojang Thread: MC-179858. The problem is that the main solution given by the Mojang moderator was to erase the cache of the map. However, there is no way to erase the cache of my world on Aternos, as it was possible to do on the 1.14 Version. My server is now in Vanilla 1.16 Version and the problem is still there.

Thanks in advance!

Hi, first thanks for replying so fast!

I forgot to state that the map that my friends and I are using is bigger than 1GB.

Is it possible to reupload a map of this size on Aternos ?

Wouldn't it erase the builds located on these specific chunks ?

Ok Thanks, I'll erase the cache, reupload the world and check MCEdit.

Thanks for the help!