AP650 is still supported by 5.9.0.2 and 5.9.1.0 , so the better way is to switch from 5.8 to 5.9 .
The problem only concern RFS7000 that last firmware is 5.8.5 and actually has no plan to get a 5.8.6.7.
maybe a solution is to drive AP650 with firmw...