Change Power BI dataset used for DQ - An item with the same key has already been added

[willclein]

Does anyone have tips for switching to a different PBI DQ dataset?

When I use the Change source dialog to switch to a different dataset with the same tables, I get an error that says "An item with the same key has already been added".

How can I switch to a different dataset without completely rebuilding the report?

[v-jianboli-msft · Accepted solution]

Hi @willclein ,

Please check whether there are some columns in the tables that have the same field name. If so, please rename these columns to enable each column has its unique field name. 

You can also refer the following similar case that could help you:

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

Besides, you can update to the latest desktop version to see if the problem still exists.

Best Regards,

Jianbo Li

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