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# ask-questions
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bored-beach-68253

04/02/2024, 1:43 AM
Hi everyone, I don't know why I got no results for my experiment when I viewed queries, I got the data but nothing is displayed in Results tab I connected with the Data Source through BigQuery
When I run logined user query inside the Data Source I don't know why two different variation id is being assigned to the same user_id
f

fresh-football-47124

04/02/2024, 1:51 AM
this can happen if you're doing assignment on a different attribute than the user_id in the report
what are you using for the assignment attribute?
b

bored-beach-68253

04/02/2024, 1:55 AM
hi @fresh-football-47124 , my assignment attribute is id I still wonder if I set attributes correctly or not ?
f

fresh-football-47124

04/02/2024, 1:56 AM
how is startupInfo.uuid set?
b

bored-beach-68253

04/02/2024, 1:57 AM
startupInfo.uuid
is basically a unique identifier that I have for each user in the application
at first, I guessed that value can be used to distinguish users
how is startupInfo.uuid set?
it is generated from backend side
I login into a few more accounts, but still receiving different variation id for same user_id (on the UI it still working correctly) may be the issue coming from setting userId I remembered that you have a page about setting clientId, and userId from GA cookie but I couldn't find it
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