Hi
Doing a clean install is a choice to downgrade to win 10 pro.
Also ,here is a tutorial which can directly downgrade from windows 10 enterprise to winodws 10 pro without losing anything, having to clean install, or restart the computer.
We should be signed in as an adminiatrator to be able to downgrade in advance.
The specific process , we could refer to this link
https://www.tenforums.com/tutorials/51564-downgrade-windows-10-enterprise-windows-10-pro.html
which may be helpful to you.
Best Regards
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