# CBRS MAC address mismatch **URL:** https://community.cambiumnetworks.com/t/cbrs-mac-address-mismatch/73495 **Category:** CBRS **Created:** [October 18, 2020, 1:31am UTC](https://community.cambiumnetworks.com/t/cbrs-mac-address-mismatch/73495 "2020-10-18T01:31:54Z") **Posts on this page:** 1 **Showing post:** 2
### Author: ![MiahSchaller](https://d10gw3vjmzyp8.cloudfront.net/user_avatar/community.cambiumnetworks.com/miahschaller/32/12263_2.png) [@MiahSchaller](https://community.cambiumnetworks.com/u/MiahSchaller) #### Post date: [October 21, 2020, 8:17pm UTC](https://community.cambiumnetworks.com/t/cbrs-mac-address-mismatch/73495/2 "2020-10-21T20:17:46Z")
In my experience, this occurs when the SM is already existing in Maestro under a different AP. Easiest way around it is to search the MAC in CBRS tool and delete it from there, then search again under Maestro Inventory and the onboarding queue and remove it from there also. You should be able to re-add the SM at that point. I had a similar post awhile back: > [@Best practice to remove CBRS SM then re-add from different AP?](https://community.cambiumnetworks.com/t/best-practice-to-remove-cbrs-sm-then-re-add-from-different-ap/67761): > > Looking for confirmation on the procedure/best practice to remove a SM from CBRS and add it back in from a different location/AP. We are running Maestro on-premise, version 2.4.1-r10 using cnMaestro as HTTP Proxy for our CBRS migration. Our test setup consists of 2 450 APs and 3 450 SMs on 16.2.1 firmware, all in-house. Current instructions for SM removal consist of deleting the CPI data from the SM and rebooting, then Deleting the device from CBRS management tool. The issue we are facing come… --- _[View the full topic](https://community.cambiumnetworks.com/t/cbrs-mac-address-mismatch/73495)._