I may be mistaken, but I believe all you need to do is update the information within the DMR-MARC website. If you use MD380tools, it should update when they receive the newest revisions of users and ID numbers.
To update the DMR-MARC database I sent an email to a contact link on their page. I included callsign, ID#, old location, new location. I recall it was less than 24 hours to change and believe I got an email when changed.
If you change your address to another state, they will issue you a number identifying the state. For example, my ID number is 3147488. The “47” in “3147” is the state identifier which for me is Tennessee. If you moved to another state that may be the reason for the new ID number.