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Flow Fail: Update "Person or Group" Type Metadata on Document Library From List

Hello all,

I am building a flow that takes an attachment (and metadata) that a user submits to a Sharepoint list and copies it to a specified document library.


I was able to successfully run this flow until I added a data collumn to capture the person that submitted the list item and attachment to trigger the flow. See below.



I then added this metadata to my document library and the flow began failing, both when trying to update the data, and when leaving it blank. See below.





Here is the flow when it is set to leave the "Submitted by claims" field blank.


Capture2.PNGThe metadata should not copy over here.

 Here is the error output when the flow is instructed to leave the data blank, as seen above.

Capture4.PNGHighlighted error message included belowBody

  "message""User value is invalid.\r\nclientRequestId: e560c883-3179-4a0e-b860-f3cba7b69a56\r\nserviceRequestId: 0274709e-0082-0000-0a60-c458b70cd648",
  "errors": [



And here is the flow when the "Submitted by Claims" data is set to be taken from "When an item is Created" dynamic content.


Capture3.PNG"Submitted by Claims" taken from "When an Item is Created" Dynamic Content

 And here is that flow failing.

Capture5.PNGError message is the same as before. See below.


  "message""User value is invalid.\r\nclientRequestId: a873746a-5ca5-4f4b-992a-f6270abd3c1e\r\nserviceRequestId: 0472709e-3046-0000-0a60-c31393e07f91",
  "errors": [


I am really confused as why this is failing. Any help would be greatly appreciated. Please let me know if there is anything I can do to clarify what is going on here.

Thank you,

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