The Ministry of Railways has shared that in order to revert back in a phased manner to the pre-COVID levels of service, its passenger reservation system will be shut down for 6 hours during the lean business hours of the night for the next 7 days. This is to enable upgradation of system data and updating of new train numbers. Since huge amount of past (old train numbers) and current passenger booking data are to be updated in all Mail/ Express trains, this is being planned in a series of carefully calibrated steps and implemented during night hours in order to minimise impact on ticketing services,” the ministry said.