{
    "Message": "validation error for column T.NAME, value ...",
    "Id": 34567,
    "Type": "Validation",
    "Subject": {
        "ObjectType" = "RelationField",
        "Relation": {
            "Name": "T",
            "Field": "NAME"
        }, 
        "Constraint": "not null",
        "Value": Null
    },
    "Source": {
        "Type": "statement",
        "Statement": {
            "Type": "insert",
            "Position": "12:3", // in owner's source
            "Subject": { 
                "Sql": "insert into T (Id, Name) values(Id, New.Name)", // called from trigger (get details from CallStack)
                "Values": {
                    "Id": 30,
                    "Name": Null
                }
            },
            "CallStack": {
                ...
            }
        }
    } 
}