Use it anyway
Screen: Room Devices (step 5 of 7) — the This join is already used box.
What it is
The right button in the box that opens when a join you typed is already used on the same processor. It keeps the join.
What to enter
Press it only when two devices should send the same join on purpose.
What it changes
In the house: Both devices send the same join after the next Save & Deploy.
In the app: Pressing either device in the app presses the same join on the processor.
If it goes wrong
- If both are Crestron lights (On, Off or Level), the box says so in red first: Save & Deploy refuses the project, because the hub can drive only one of them. Change one of the joins.