My understanding is that if the replacement has lower miles on the odometer the stored miles in the car (I forget which module stores the clone) it will sync the higher miles to the new dash.
Definitely find the confirmation on that before plugging in. The car will become the higher of the two modules from my understanding.
Do you know the odometer of the replacement dash?
The host car must be similar to work properly but you'll get a tamper dot unless the vin is coded in.
https://www.precisionecu.com/product...ning-unlocking
See link above.