If you have an H&S & MCC you can turn off that parameter & the Variable turbo function that controls the actuator.
If not, whoever wrote your custom tune for the single turbo should be able to help you with this.
You would need H&S's Maximum Calibration & Control programming which would give you the ability write custom tuning for your mini max.
Contact some of the Vendors on this site & they should be able to get you set up.