Allow Multiple Selection Causing Error on Drop Down

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Posted on 24 Jun 2025 20:42:45 by Trout19

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I have created a custom form for a SharePoint list. I have two dropdowns that require multiple selections. When i turn on the feature in share point it get this error.

I added them to the form with no modifications.

The error only occurs after I change the setting.

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WarrenBelz 148,914 Most Valuable Professional on 27 Jun 2025 at 00:01:04

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Allow Multiple Selection Causing Error on Drop Down

Hi @Trout19,

A quick follow-up to see if you received the answer you were looking for or if you need further assistance.

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WarrenBelz 148,914 Most Valuable Professional on 24 Jun 2025 at 21:28:00

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Allow Multiple Selection Causing Error on Drop Down

Hi @Trout19,

If you change the field type in SharePoint, you need to let Power Apps re-create the controls attached to it. You can call it a bug, but it seems to remember how it was originally bound to the field. Delete the Data Card and add it again to the Form.

Please click Does this answer your question if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it a Like.
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Suggested answer

StretchFredrik 3,085 Super User 2025 Season 2 on 24 Jun 2025 at 21:12:57

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Allow Multiple Selection Causing Error on Drop Down

Could you double check both your form in PowerApps and the columns in SharePoint so that both expect multi-select values?

The error you are getting is most likely because the SharePoint column believes its only supposed to take 1 value and not multiple.

If my response solved your issue, please mark it as ✅ Accepted Answer and give it a like.