Hi, I am Dave, I will help you with this.
That error indicates the wrong version of Windows is installed on your PC, you have a Windows 11 Home licence and the Pro version is installed.
1
If you backup your files and clean install Windows Home using a bootable Windows 11 USB, then that version of Windows will automatically activate from the OEM licence on your motherboard.
2
Otherwise, you would need to purchase a Windows 11 Pro licence and use the product key to activate the currently installed Windows 11 Pro, in this case, you would not need to re-install Windows.