Unable to delete gifted livery - 20th Anniversary

Bug Info: Downloaded a gifted livery for the 2005 Honda NSX-R of the FM1 20th Anniversary livery. I did not like the design and decided to swap to another livery. Wanting to create space for other designs I tried to remove the 20th Anniversary design from my catalog but was unable to do so - The prompt to “Delete” does not exist.
Platform: Xbox Series X
Edition: Premium Edition
Account: Solo account
Attempted fixes:
(1) Rebooted the game fully from dashboard.
(2) Tried putting another livery on the car but the issue still persists.
(3) Tried removing the car from my garage but the issue still persists.
Content Update: Unknown as this is the first gifted livery I’ve downloaded.

I have noticed the same thing . How ever I have also noticed it on other liveries that were also given out . EG . there was a livery for a McLaren P1 which was given out some time ago . It comes up as locked ( which is the usual thing since it was created by another user ) . But there is no delete option on that either . I dont think it applies to content that you normally get from designs shared by other players . But the ones given out in the game seem to be permanent .