Acronis True Image 2021: Validation of all backup versions fails if some of the full backups were removed manually

Symptoms

You created multiple full backups in .tibx format. Then some of the backups were deleted or moved to a different location.

When you try to validate the backup using Validate all versions option, validation fails.

Cause

Specifics of product implementation. If some of the backups were moved or deleted outside Acronis True Image interface, then the integrated backup structure will be broken, resulting in the inability to validate the backup, as some parts of the backup archive are missing.