"Invalid query, DataSet schema needs to be updated" Error message

Hello,

Ive recieved this error message when running my dataflow "Invalid query, DataSet schema needs to be updated".

What does this exactly mean?

The run was successful and shows about 2.1k rows, but won't let me see them in the Data tab.

Thanks!

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Is this a magic ETL or MySQL data flow?

Is this a magic ETL or MySQL data flow?

MySQL, it seems like running the dtaflow again solved the issue.

I am running a mySql data flow and getting the same error. I have run it multiple times.