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Restore rejected
Understand common reasons why a file is not accepted during restoration.
A restore can be rejected when the file is not a Revisync backup, is incomplete or was changed during transfer.
What to try
Return to the original file, avoid editing it in a spreadsheet and copy it to the device again. If possible, try a second backup created by the app. Check whether the installed version is compatible with the backup.
Do not rename an extension as a way to repair the file. That does not turn a different file into a valid backup.
Preserve the current state: if the new device already has data, do not clear anything until you have confirmed that the correct file was found.