Sensitivity label cannot be assigned since sensitivity label owner email cannot be computed for this file

Question

Hi all,

when trying to assign a sensitivity label by the Graph API endpoint

`/drives/${listDdriveId}/items/${itemId}/assignSensitivityLabel`

I get an error, when the last operation on this item/document was performed by an app (Editor 'SharePoint App'):

 "error": {
    "code": "notSupported",
    "message": "Sensitivity label cannot be assigned since sensitivity label owner email cannot be computed for this file. Please retry after you have touched the file.",
    "innerError": {
        "date": "2023-09-06T08:03:45",
        "request-id": "2d02b344-fafc-48ae-8983-d9f197c21850",
        "client-request-id": "..."
    }
}

After I update the metadata of the item within a normal user context I can set the sensitivity label successfully with the Graph API endpoint (called by an app).

Unfortunately this is not possible in my scenario.

Is there a way to circumvent this error?

Thanks and best regards.

Sebastian