Script led feedback with modifier

Hello everyone, small problem with my script. I’ll just show you the part of my script that is causing the problem.
Following the advice of the community, I assign the value of the track that contains “LC1” in its name to the modifier m1. I set m1=-1 if the track does not contain “LC1” to be able to manage the feedback LED.
If m1=-1, the LEDs are off.

Everything works as expected except if the m1 track does not exist, the encoders of my controller (track 1 of the controller) move the parameters of the devices of the last track of the session.
So I thought about assigning to the tracks that do not contain “LC1” the value of a modifier that I do not use like m9=1. So I no longer have a problem with an encoder that moves the parameters of a non-“LC1” track.
But then I can’t configure my LED feedback for the LC1 track (m1). especially to turn off the LEDs if I delete the “LC1” track
In my script I copy this technique for LC2=m2 etc up to m8.
Thanks in advance if you can help me.