Hi @basukunal001 ,
Do you want to patch SP Group to Person or Group field in your SP List?
I have made a test on my side, please try the following workaround:
The Person or Group field configuration as below:

App's configuration as below:

Set the OnSelect property of the "Patch" button to following:
Patch(
'20190816_case6',
Defaults('20190816_case6'),
{
ProductName: "SP Group Test",
SPGroupPeopleField: {
Claims: "c:0o.c|federateddirectoryclaimprovider|" & LookUp(Office365Groups.ListOwnedGroups().value, mail = "PowerApps@xxxxxx.xxmicrosoft.com").id,
Department: "",
DisplayName: "Power Members",
Email: "PowerApps@xxxxxx.xxmicrosoft.com",
JobTitle: "",
Picture: ""
}
}
)
On your side, you should type the following formula:
Patch(
'Your SP List',
Defaults('Your SP List'),
{
ProductName: "SP Group Test",
SPGroupPeopleField: {
Claims: "c:0o.c|federateddirectoryclaimprovider|" & LookUp(Office365Groups.ListOwnedGroups().value, mail = "<Type Your SP Group Email Address Here>").id,
Department: "",
DisplayName: "<Type your SP Group Name Here>",
Email: "<Type Your SP Group Email Address Here>",
JobTitle: "",
Picture: ""
}
}
)
Note: You need to add Office 365 Groups connector as data source in your canvas app firstly.
Please try above solution, then check if the issue is solved.
Regards,