Switching an external volume from the old <uuid>_<name> volume to the
declared external volume on redeploy could make an app look as if it
lost its data (for example a database that initializes a new, empty
data directory).
- If a resource already has the storage entry with the old generated
name, the parsers keep using that volume and show a warning in the
deployment log and the service start log, with the steps to switch.
- Without that entry (new resources, or external volumes added later)
the external volume is used as declared.
- Deleting the old storage entry (storage page) switches to the
external volume on the next deployment; the storage entry shows a
note about it.
- Legacy Compose applications (parser versions 1 and 2) never stored
their volumes, so they keep the old volume names.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
