After migrating my mojang account to a microsoft account, when i received the notification in the minecraft launcher, I am not able to play minecraft java despite paying for it previously on my mojang account. Once i migrated my account, and i log  in to the minecraft launcher using my microsoft account, which allows me to log in, the minecraft launcher says 'playdemo' and once logging in to the minecraft website it also says that i need to purchase minecraft... again.

NVM HE DIDNT DO IT CORRECTLY