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Hi  Cynthia-gogogo ,

The error message indicates that there is a duplicate key in the table list. This can happen when there are two or more tables with the same name in the model. Please refer the solution in the following thread to solve it:

Rename table name:

Solved: Unexpected error: An item with the same key has al... - Microsoft Fabric Community

Is your Power BI Desktop the latest version, if not, you can update to the latest version.

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This is the related document, you can view this content:

Solved: DAX Studio connection error "an item with the same... - Microsoft Fabric Community

Best Regards,

Liu Yang

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