If you are unable to change the personal folder in Windows, such as Documents or Downloads that is mapped another folder or OneDrive folder, follow the below steps to fix it.
Workaround:
Step1: Windows + R and open regedit
Step2: Go to the following location
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
Step3: Find the registry key for the folder that encounters this issue, and change it to the default value.

Step4: Restart the Explorer.exe process to make the changes take effect or Restart the computer.