According to Microsoft Forum Moderator Ruizell Rey:
To resolve your concern regarding duplicated OneDrive entry, follow
the steps below:
Search for regedit, and then press Enter.
Open HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Desktop\NameSpace
Check si vous avez several folders under NameSpace.
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If there are several folders, highlight each folder, and then vérifiez le name of the Data à droite hand side.
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If you see multiple folders with OneDrive as the Data, clic droit on it, and then select Delete.
Important : This section, method, or task contains steps that tell you how to modify le registre. Cependant, serious problems might occur
if you modify le registre incorrectly. Therefore, assurez-vous that you
follow these steps carefully. For added protection, back up the
registry before you modify it. Then, vous pouvez restore le registre if a
problem occurs. For more information about how to back up and restore
le registre, refer to the following Microsoft Knowledge Base article.
Comment back up and restore registry and Creating a system
restore point.