Karim Rivera

@Til Weimann 
Thanks for the advice!, will wait until this bug has been fixed.
Now loading the backup

Can confirm, when updating 1.16.5 to 1.17.1, only on new chunks.
Is it safe to play this way?, or might better to load the 1.16.5 backup.

@Hudson_Bradley , I did not use the "Erase Cached Data", and it was 1.16.1.
If its useful, i also tried to load all villages in the world before updating, but still i couldn't find all of them,so the error continued, until i optimized the world in single player.
 

Updating the world in single player to 1.16, and then,  using the optimize world option almost nullifies this error, only sends the error one every 15 minutes or even more time between errors.

Edit: It seems that after a restart of the server, the error messages stopped 

Only not fully loaded villages are affected?, or all villages are?
Im trying to update loading all incomplete villages but still throws the error.

Is this just affects the console? or its like Village corruption?
A console log filter could be a workaround?