How to setup the Bambu 0.6 Hardened Steel Nozzle on the A1

I’m trying to setup the Bambu 0.6 Hardened Steel nozzle on my A1 but am having trouble. When I try to set it up using this dialog:

CleanShot 2025-06-14 at 02.16.13@2x

I get this error:

CleanShot 2025-06-14 at 02.16.48@2x

Why is this? And how do I get this installed? Appreciate any help. Thanks.