How to Update a Field through a button's OnSelect Event

I was getting a nasty error on submit with the last solution:  "An entry is required or has an invalid value. Please correct and try again."  If you click on Submit again, the error goes away. 

Others have discovered that this error is caused by having the SharePoint List ID field on the form. I removed it and it went away. However I need to access the ID to use Patch. So I dug and found I can get the ID from the SharePointIntegration Object as the property SelectedListItemID. 

Works and no submit error message. 

Patch('Store Task Template',
First(Filter('Store Task Template',ID=SharePointIntegration.SelectedListItemID)),
{
    Status:{'@odata.type':"#Microsoft.Azure.Connectors.SharePoint.SPListExpandedReference",
    Value:"Complete",
    Id:1
    }
}
)