Error inside our Edit form on a SharePoint lookup field "The attempted operation is prohibited because it exceeds the list view threshold."

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Posted on by johnjohn123

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We have 2 SharePoint lists:-

1) Projects

2) Tasks. The Tasks list has a SharePoint lookup field which reference the Projects list, as follow:-

now the Project list has around 11,000 items >> and when we added an Edit form for the Tasks list inside Power Apps canvas app we got this error on the Project lookup field:-

so is there a way to overcome this?

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Building Power Apps

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EddieE 4,641 Moderator on at

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@johnjohn123

Make sure you have some indexed columns and I think that all you need to do is make sure that this column is one of those indexed ones?

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johnjohn123 3,514 on at

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@EddieE yes we already defined indexes for the columns. where we defined an Index on the Project lookup field inside the Tasks list as follow:-

and also we index the Title field inside the Projects list, as follow:-

but still we are getting the error.. any advice?

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EddieE 4,641 Moderator on at

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@johnjohn123

Yeah ok, I thought that may not work tbh. I've used that technique for Text / Numeric columns before and it does work - just wasn't sure about LookUp columns because I avoid them in my PowerApps. They are too problematic.

Here are a few forum links that may help you out? The first one seems to provide a solution but I cannot test because I don't have a large enough list to test on. The other 2 (slightly older) suggest that the only way to solve this is to create Text/Numeric helper columns and use these in your filtering.

1. https://powerusers.microsoft.com/t5/Building-Power-Apps/Sharepoint-List-View-Threshold-affecting-Power-App-Lookup-column/td-p/1798442

2. https://powerusers.microsoft.com/t5/Building-Power-Apps/PowerApp-SharePoint-Lookup-Column-Threshold-Limit/td-p/791642

3. https://powerusers.microsoft.com/t5/Building-Power-Apps/Lookup-column-threshold-affecting-power-app/td-p/681202

Sorry I couldn't be of anymore help.

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