How to change TCP port of PX4

I’m currently trying to use PX4 on multiple simulators and I’m using AirSim simulator. I can change TCP port of AirSim simulator but cannot change TCP port of PX4. Because of this, I can only connect to one simulator. How can I fix this problem?

Duplicate of (Edited) How to change TCP port on PX4 - #2 by danielhonies.