how to splice table row in array with in a array

Any idea on how to splice table row from a array within a array?

   'gl' => 
     array (
      0 => 
       array(
       'data1' => 1
       'data2' => 1
       'data3' => 1
       'gl2'=>
         array(
          data1 => 1
          data2 => 2
          data3 => 3
        )
      )
    )

and this is my splice function

   function splice(data1,data2){

        var gl_data = gl.find(g => {
          return g.data1== data1
              })
        var found = gl_data.gl2.find(c => {
          return c.data2== data2
        })
        if (found) {
          var index = gl_data.gl2.indexOf(found)
         gl_data.gl2.splice(index, 1)
        }

      }

it will prompt an error in my console TypeError: Cannot read property 'gl2' of undefined.. any idea?

via Chebli Mohamed