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Power Automate - Building Flows
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Flow to Populate Dataverse Lookup column working but still showing blank

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Hi Everyone,
 
I have a flow which I'm using to populate some lookup columns in a dataverse table. I have one version which work successfully, and another where the flow runs successfully, but when I look at the table that is supposeed to be populated, the value is not showing. It just looks blank. The only difference between the two flows is that one retrieves the GUID from a list rows step whereas the other retrieves the GUID from an expand query step.
 
The GUIDs from the output results are the same, and as mentioned, both flows say that they have run successfully. Just the one based off of the expand query step returns no value. Any thoughts?
 
For context, both are being used to populate the lookup column within an "add a new row' step within Dataverse. However, the expand query GUID is adding the new row within an apply to each step. Just in case that has something to do with the observed behaviour.
 
Here is a screenshot of the flow which is 'successful' yet not populating.

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