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+1. `.work/R4.11/lib.ps1:39` — [P2] Restore-Data deletes its backup even when restoring an originally absent file fails. The removal branch at line 37 suppresses every deletion error with `-ErrorAction SilentlyContinue`. Back up with `settings.json` absent, create that file during the run, and hold it open without delete sharing: Restore-Data returns normally, leaves the generated settings in place, and deletes the backup. Reproduced with the unchanged functions and disposable directories; evidence: `.work/R4.11-r2/restore-errors.log`. Propagate deletion failures other than an already absent file, retain the backup until every file is restored successfully, and add this failure case to the regression.