WETHERSFIELD, Conn. (AP) - Connecticut's Department of Motor Vehicles says it discovered about 8,340 vehicle owners have not renewed registrations due last February because they didn't receive a renewal notice.

The registrations were flagged for renewal in the department's computer system but notices were never printed, the agency announced Friday. The DMV says the mistake was discovered during an ongoing review of its troubled computer upgrade.

The department says it's now sending out revised renewal notices. Drivers are being urged to carry the notice in their vehicle to show police, if stopped.

Affected vehicle owners will have 30 days to complete their registration renewals. Any late fees associated with the overdue notices will be waived. Renewals cannot be done online.

The DMV is providing an envelope with the notices to help customers avoid visiting a branch office.