Error deleting entries with Grid field

A PHP Error was encountered

Severity: Warning

Message: Illegal string offset 'row_id'

Filename: grid/ft.grid.php

Line Number: 115

print_r( $entries );

Array
(
    [params] => Array
        (
            [sort] => asc
            [orderby] => row_order
            [limit] => 100
            [offset] => 0
            [search] => Array
                (
                )

            [backspace] => 0
            [row_id] => 0
            [fixed_order] => 0
        )

    [19] => Array
        (
            [82] => Array
                (
                    [row_id] => 82
                    [entry_id] => 19
                    [row_order] => 0
                    [col_id_1] => Banana
                    [col_id_2] => https://ellislab.com/asset/images/team-photo/bnb5.png
                    [col_id_3] => 1294012800
                    [col_id_6] => 
                )

            [83] => Array
                (
                    [row_id] => 83
                    [entry_id] => 19
                    [row_order] => 1
                    [col_id_1] => Armadillo
                    [col_id_2] => https://ellislab.com/asset/images/team-photo/bnb4.png
                    [col_id_3] => 946080000
                    [col_id_6] => 
                )

        )

)