rollback
nounUK /ˈrəʊlbæk/
US /ˈroʊlbæk/
A rollback is when something is changed back to how it was before.
The store announced a rollback of its prices, so everything got cheaper again.
OTHER MEANINGS
2. A reduction in price or cost, often back to an earlier level.
The supermarket's rollback on milk made it much cheaper this week.
3. The act of forcing an enemy to move back or give up land.
The army's rollback of the invaders freed the town.
4. In computers, a return to an earlier saved version of data.
After the update broke the app, they did a rollback to the old version.