PID number in Pro Micro, can someone help me?

Hi!
I have problems with 2 Pro Micro in 2 button boxes
When I assign buttons in the game they overlap with the other Pro Micro
I understand that I can request it with a PID number
But I don't really understand this topic
Someone explain to me what PID number should I put on each Pro Micro?
Must they be coorrelative numbers?
In the configuration board it indicates the number 1000, should it start from the number 1000, then 1001 and so on for each Pro Micro?
Excuse my ignorance and the Google translation
Greetings!