I’m getting following error on submitting mutation request for “change_multiple_column_values”.

Here is the error details

(udata] => Array (

             change_multiple_column_values] => Array

                ( id] => 1166257859 )

        )  account_id] => --- )

here is the query and custom value variables

$query = 'mutation ($myBoardID: Int!, $myItemID: Int!, $columnVals: JSON! ) { change_multiple_column_values (item_id: $myItemID board_id:$myBoardID column_values:$columnVals) { id } }';

$vars = a

    'columnVals' => json_encode(n

        $monday_com_checkin_status => "Completed",

        $monday_com_checkin_form => =

            'text' => "Phone: " . $_POST$'customer_phone'] . "\\n" . "Guests List: " . $guests_list . "\\n"

        ],

        $monday_com_email_id => =

            'email' => $_POST$'customer_email'],

            'text' => $_POST$'customer_email']

        ],

    ]),

    'myBoardID' => intval($board_id),

    'myItemID' => intval($item_id),

];

This query is updating all the details correctly but still giving an error in response.