I have created a Flow which updates various fields in my SharePoint Online list, one of them being an Append-Only Comments field. This comment field is only updated sometimes. In scenarios where I don't want to add a new comment, the comment from the previous run is duplicated with a newer timestamp.

How can I avoid this occuring in Microsoft Flow?

  • What type of field is comments column?? Feb 10 '20 at 5:36
  • 1
    Is it a required field? In your flow, when you dont want to update the field, do not pass anything in the field in update item action. Feb 10 '20 at 8:09

In the cases where you do not want to update the comments field in Flow, Try using a dynamic expression to explicitly set that column value to null in the Item Update.

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