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SharePoint list custom form not submitting

Evening all, I have a problem for which I'd like some help (and if possible an explanation of the behaviour). Here's the issue:

  • I have one SharePoint list which acts as a master list of projects (it uses the Title column and this column has three records, 'Project X', 'Project Y' and 'Project Z').
  • I have a second list where I have a choice column called 'Project' and I want to use these values. I have customized the form with an on start action to write a collection to get the project names. I have replaced the original value in the datacard to the name of the collection. These values appear in the datacard.
  • When I go back to SharePoint and try and add a new record, the values is not saved.

I have tested the above and when I write to a single line of text column, it works - so the questions are:

  1. What do you need to do to write values into the choice column, and
  2. Why can't you just swap out one set of choices for another and it just works?


Thanks in advance,



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