[MC-72707] to change the version of 1.8 to any other, all items disappear. chests, inventory, etc

beginning in version 1.8 and change to any other version . in my world all items disappear

Related issues

migrated 2014-10-05T04:40:55Z

Downgrading isn't supported. MC-45009

migrated 2014-10-05T04:46:20Z

only applies to the 1.8

migrated 2014-10-05T05:07:59Z

beginning in version 1.8 and change to any other version .

That's still downgrading.

migrated 2014-10-05T19:17:20Z

change to future versions ?