## Summary
The 1.23 backfill command (`upgrade:1-23:backfill-record-page-layouts`)
creates standard page layout widgets from `STANDARD_PAGE_LAYOUTS`. Some
widgets reference field metadatas via `universalConfiguration` (e.g. the
`opportunity.owner` FIELD widget pointing at universal identifier
`20202020-be7e-4d1e-8e19-3d5c7c4b9f2a`).
If a workspace's matching field metadata does not exist or has a
different universal identifier (e.g. older workspaces created before
standard universal identifiers were backfilled), the runner throws
```
Field metadata not found for universal identifier: 20202020-be7e-4d1e-8e19-3d5c7c4b9f2a
```
and the entire migration for that workspace aborts. This was the
underlying cause behind the `Migration action 'create' for
'pageLayoutWidget' failed` error surfaced by #19823.