I believe you can ask Admin to reset your collection to a certain timepoint. Not sure if this can be done for In-Transit. It would also eliminate anything you have done since that time.
Depending on the number of cards, it may be easier to reenter them one at a time.
Bruno
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Check my Profile page to see my 2023 Goals and my Lists of sets near completion (5 cards or less) or sets getting close (less than 100 cards missing and 75% complete).
https://www.tcdb.com/Forum.cfm/Page/B/ID/0/?MODE=VIEW&ThreadID=25745&C=0