From starting ER ki 2391/92 magadh express with sleep 3467/68 Vikramshila chalti thi after pnbe.to bgp ..uske bad ER se ECR bana. Ecr ko transfer with same number and sleep Express bani vikramshila with new number 2367/68 upto ndls bgp. Then train transfer to NR. NR ki trai shramjeevi transfer to ECR. Transfer the numbers of trains with each other. As 2391/92 shramjeevi jo abhi bhi hai..pahle magadh ka number tha. Aur magadh ko mila 2401/2 jo pahle shramjeevi ka tha. Uske bad iska rake transfer hua NCR ko with 2451/52 RSA Shram shakti. Phir iska rake transfer hua NWR KO Rsa with...22481/82 Dee jodhpur express. Phir iska zone transfer hua SER ko RSA with 18623/24 hta ipr Express.