[2.4, UI] Validation wrong for IPMI driver type over API and UI

Trying to add a machine over the UI, I get the following error no matter the power type used.

['LAN_2_0', 'LAN_2_0 [IPMI 2.0]'] is not of type 'string' Failed validating 'type' in schema['items']['properties']['default']: {'type': 'string'} On instance[0]['default']: ['LAN_2_0', 'LAN_2_0 [IPMI 2.0]']

Or API:

ubuntu@maas00:~$ maas admin machines create power_type=ipmi power_parameters_power_address=192.168.122.5 architecture=amd64/generic mac_addresses=aa:bb:cc:dd:ee:33
['LAN_2_0', 'LAN_2_0 [IPMI 2.0]'] is not of type 'string'

Failed validating 'type' in schema['items']['properties']['default']:
    {'type': 'string'}

On instance[0]['default']:
    ['LAN_2_0', 'LAN_2_0 [IPMI 2.0]']

Reproduce:

1. Install MAAS
2. Go to the UI
3. Add machine
4. Provide random hostname/mac
5. Select IPMI
6. Power driver: DONT select anything
7. Address/user/password: Put random values.