To remove a flag (radiere), you must resolve the underlying issue:
Minor administrative fines that weren't paid can sometimes lead to a "mandat de aducere" (summons) being issued.
If an officer informs you that you are "flagged in the system," follow these steps:
Ask exactly what the alert is for. Officers are generally required to tell you if it is for a witness summons, an unpaid fine, or a specific court order.
Driving with a suspended license or an expired ID that was flagged for pickup.
If you are traveling in Europe, you may be flagged for an European Arrest Warrant or as a person of interest in another EU country.