Save Conflict - When Planner task is completed update SharePoint list item

[Brice235i]

Hi, I have a set of planner tasks in a bucket for a subject area e.g. Course 1 - Task 1, Task 2, Task 3.

Course 1 is an list item in SharePoint with columns for task status for Task 1, Task 2, Task 3.

When the task in Planner is closed a flow updates the status for the associated task column.  

Unfortunately people are closing out the tasks all at once, without a significant delay between each one.  Therefore I'm getting a save conflict on the Update Item action and the flow is failing.

Unfortunately the Retry setting the the update item action isn't working.

Wondering if anyone has any ideas.  Thank you.

[DamoBird365]

Hi @Brice235i 

Would inserting a delay help?  Is the conflict between the users and the flow or all of the flows running together?

The other option might be to reduce concurrency.  

Damien

[Brice235i · Accepted solution]

Hi there, unfortunately no.  The solution was to create another list "Completed Tasks". with a yes/no column "Processed" .  When a task is completed a single list item is created in "Completed Tasks".  A scheduled flow gets all the list items from "Completed Tasks" where Processed = no.    Loop through them to get the original list item and then update the parent list item... then update "Completed Tasks" Processed = Yes.  
I wonder if I should submit a uservoice idea to include the 400 error in the Update Item Retry setting...