The game doesn't warn you on the old world before 1.18 release
Linked issues
duplicates 1
Attachments
Comments 2
(See MC-227787.)
MC-243155
The game doesn't warn you on the old world before 1.18 release
Resolved
Duplicate
0
1.18 is a stable version and therefor the game doesn't need to let you know to make a backup.