Hue - How to force it to re-authenticate

Hi,

Ive just moved my who setup from a PI3b to a 4B and everything works wonderfully, except hue. My feeling is that hue is rejecting the new hardware and I need to re-do the button push authenitcation. Home assistant meanwhile seems to think Hue is working just fine. Any idea how to force a new handshake (ideally without deleting all my hue entities completely in the process). The Hue documentation suggests a token is saved to the config directory - Ive looked for this to attempt a delete,but cant find it - any ideas appreciated!

Thanks

I’ve got the same issue. Any idea how to fix it?