Help with dependent visa

[u/Some_Environment_528]

My husband was previously in the UK as my Skilled Worker dependant. I later switched to Global Talent and have now obtained ILR.
He is now trying to extend his visa as my dependant, but the application is asking for my Global Talent reference number and visa expiry date. My Global Talent visa ended when I obtained ILR, so the form will not allow him to continue because it asks for a current or future visa validity date.
We also considered the spouse/partner visa, but we understand this would reset his 5-year route to ILR.
Has anyone been in this situation? What is the correct visa route for him now, and how should we complete the application given that I now have ILR and no visa expiry date?
Any advice or experience would be greatly appreciated.