Cannot update the multiple people picker using patch statement

[koyena]

Hello everyone,

I have a sharepoint list and a multi people picker column. I am having a canvas app without SP integration. The problem I am facing is whenever I am opening the app in Edit mode and trying to update the data using patch I am getting an error that basically translates to missing Mail part in the Claims... This issue is happening if I am not touching the people picker control in my form and trying to update. the snippet I am using to update the people picker is as follows - 

ApplicationTechArchID:
ForAll(pplTechArchID.SelectedItems,{
'@odata.type':"#Microsoft.Azure.Connectors.SharePoint.SPListExpandedUser",
Claims:"i:0#.f|membership|"&Mail,
Department:"",
DisplayName: DisplayName,
Email: Mail,
JobTitle:"",
Picture:""
}),