Race condition in PRS state updates

For PRS collections the individual states are potentially updated from individual nodes and sometimes from overseer too. it's possible that

1. OP1 is sent to overseer at T1
2. OP2 is executed in the node itself at T2

Because we cannot guarantee that the OP1 sent to overseer may execute before OP2 tyhe final state will be the result of OP1 which is incorrect and can lead to errors .

The solution is to never do any PRS writes from overseer.