Unresolved busses error but no Halion in project?

Getting the error below when opening my Cubase 11 Pro project. Only this project, definitely no Halions present. Have tried saving new version, checked all VSTs etc but nothing shifts it. Any ideas anyone?

This is most likely from Groove Agent. Please use this menu to replace the missing buses and click Apply.

Hey there. Thanks so much for the pointer it led me in the right direction.

In the end I solved it by reloading the kits in GA and this sorted out the auxs. No sure why it went weird in the first place but I wouldn’t have guessed it was coming from GA and not Halion so thanks very much!