This message from the SCSI tape drive appears when Archive tapes generate too many soft (recoverable) errors. It is followed by the advisory "Periodic head cleaning required and/or replace tape cartridge" message. Soft errors are an indication that hard errors could soon occur, causing data corruption.
First clean the tape head with a cleaning tape as recommended by the manufacturer. If that doesn't work, replace the tape cartridge. You might need to replace the tape drive if the problem still occurs with new tape cartridges.