I have 2 Spotify accounts and want to merge them into one account

[John-R17]

My main Spotify Free account I've had for several years is with my email hotmail.co.uk and on my Windows 10 PC. Spotify is always Logged In.
I've recently added Spotify to my new mobile Google Pixel 8A and set up a new Spotify account. I realise now a mistake! It is with my email gmail.com
What procedure do I need to follow to have my long-standing Spotify account on my PC appear on my Pixel mobile? - I could change my Spotify account email Hotmail to my Gmail address if that would help to start with.
Thank you. John-R17