pg_dumpall from the postgres version you're upgrading to, not the old/curent one https://www.postgresql.org/docs/current/upgrading.html#UPGRADING-VIA-PGDUMPALLtemp.yaml compose file:services:
old:
image: postgres:13
container_name: pg13
volumes:
| {"log":{"version":"1.2","creator":{"name":"WebInspector","version":"537.36"},"pages":[{"startedDateTime":"2025-04-10T10:17:13.207Z","id":"page_1","title":"https://cloud.example.de/apps/files/favorites/150100?dir=/Events/2024/2024-10-04%20idk/SomeUser%20Gopro","pageTimings":{"onContentLoad":2111.951000006229,"onLoad":2734.22600000049}}],"entries":[{"_connectionId":"151697","_initiator":{"type":"script","stack":{"callFrames":[{"functionName":"","scriptId":"3021","url":"https://cloud.example.de/dist/core-common.js?v=150e6fb3-12","lineNumber":0,"columnNumber":3680728},{"functionName":"xhr","scriptId":"3021","url":"https://cloud.example.de/dist/core-common.js?v=150e6fb3-12","lineNumber":0,"columnNumber":3678732},{"functionName":"m","scriptId":"3021","url":"https://cloud.example.de/dist/core-common.js?v=150e6fb3-12","lineNumber":0,"columnNumber":3685227}],"parent":{"description":"Promise.then","callFrames":[{"functionName":"_request","scriptId":"3021","url":"https://cloud.example.de/dist/core-common.js?v=150e6fb3-1 |