Unassigning MAC Address from interface does not reset primary mac address

[timeu]

Deployment Type

Self-hosted

NetBox Version

v4.2.2

Python Version

3.12

Steps to Reproduce

1. Create a device (device1) (any device type)
2. Create an interface (eth1) (any type)
3. Create a MAC address (AA:AB:CC:DD:EE:FF) and assign it to the device1 and interface eth1
4. Go to interface eth1 on device1 and edit the device
5. Assign the MAC address AA:AB:CC:DD:EE:FF as the primary MAC address
6. Go to the MAC address view and select the AA:AB:CC:DD:EE:FF address
7. Unassign it from the selected interface

Expected Behavior

The primary mac address of the interface should be set to NULL / reset

Observed Behavior

The primary mac address of the interface still shows AA:AB:CC:DD:EE:FF