How to upload image into image field

[Alon Grod]

Hi,

I have a task to upload to all users in sys_user table an image from db_image table ('robot.png) into photo field in sys_user table.

What am I doing wrong?

var img_name = 'robot.png';
var img_sys = '8ca915f2b810311020d2e07b34d7565d';

var ga =   new GlideSysAttachment();

var gr = new GlideRecord('sys_user');
gr.query();
while(gr.next()) {
	ga.copy(img_name, img_sys, "sys_user", gr.sys_id.toString());
}