This is clearly a sign of operational risk whereby the team used outdated data to do a batch run resulting in a malfunction of their backup system leading to a system crash. Not going to be an easy time for DBS to clean up this mess.
Damn Bloody Slow bank - This is what my chinese therapist joked about with me. In a way, it is pretty true judging from the long lines of human waiting to withdraw cash from their machines on a daily basis.
Hopefully, they would have learnt from this lesson and implement tighter controls over data management.