Ros moveit pick always off set

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Hello

i got a Problem with the Pick comand in ros. The robot moves to the object but with an offset. When I change the quaternions of the created box, it is offset somewhere else to the object. How do I get it to move exactly to the object? Here is my code for the addbox and the pick and a picture.

def add_box(self, timeout=4):

    box_name = self.box_name
    scene = self.scene

    box_pose = geometry_msgs.msg.PoseStamped()
    box_pose.header.frame_id = "world"
    box_pose.pose.orientation.w = 0
    box_pose.pose.orientation.x = -1
    box_pose.pose.orientation.y = 0
    box_pose.pose.orientation.z = 0
    box_pose.pose.position.z = 0
    box_pose.pose.position.x = 0.3
    box_pose.pose.position.y = 0.3
    box_name = "part"
    scene.add_box(box_name, box_pose, size=(0.1, 0.2, 0.05))
    self.box_name = box_name
    return self.wait_for_state_update(box_is_known=True, timeout=timeout)


 panda_move.add_box()


panda_move.move_group.pick(object_name='part' , grasp=[],plan_only=False)

with box_pose.pose.orientation.y = 1 or with box_pose.pose.orientation.y = -1 you get this: