downdating

Verb

downdate (third-person singular simple present downdates, present participle downdating, simple past and past participle downdated)

1. To alter, degrade or downgrade to an earlier or worse version, especially when it was intended to update.
2. To undo an update.
   • I downdated the database to undo the most recent update.
3. To date earlier.
   • These excavations should be downdated.