Recovering before images with rollback
If you choose to recover before images, then you can also choose the rollback option.
- The current resource definition must match the after image of
the most recent of the selected changes.
If no current resource definition exists (it has been deleted), then the after image of the most recent of the selected changes must be empty (reflecting the deletion).
- The before image of the most recent of the selected changes must match the after image of the second most recent; the before image of the second most recent must match the after image of the third most recent; and so on, until the oldest of the selected changes, whose after image must match the before image of the second oldest.
The following figure illustrates the concept of a rollback chain:

For example, suppose you want to undo changes within a specified time period by a particular user. To avoid overwriting more recent changes, or changes by other users, use the rollback option to recover the before images.
If a resource definition was not recovered due to a break in the rollback chain, then the Prompt column for each of the selected changes for that resource definition shows "*Errors". For details of the error, enter ? next to the change.
The rollback option applies to each resource definition individually: a break in the rollback chain of one resource definition has no effect on the recovery of other resource definitions in the set of selected changes.