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Hey Tom! Yea, if we don't know the default data set at the time of creating the data source, the default query won't be 100% correct. To change this, you can go to the data source in your account, and then go to the "Experiment Assignment Queries" section. There you can edit the SQL Query to replace

my_dataset

with the actual dataset where the experiment assignments are stored.

Aha brilliant, thank you!!