The government said Tuesday it will fix a COVID-19 vaccine booking system fault that allowed reservations to be made using nonexistent application numbers.

The announcement came a day after the government started accepting online bookings for older people to receive shots at large Self-Defense Forces-staffed vaccination centers in Tokyo and Osaka as it attempts to ramp up its inoculation rollout amid a fourth wave of infections.

The state-run booking system for the vaccination center in Tokyo was found to accept municipality code numbers and vaccination ticket numbers that were not issued by respective authorities.