ask for help, the rigidbody sword slides sometime

[pixelcrab123456]

Clipchamp.mp4

I dont know could I ask for help there ,I'm using Godot 4.2 with Box2D 0.9.11, the sword moves by rotating, which usually works fine, but sometimes it slides forward as if it has no friction. Could some give me some direction on how to solve this problem?

the sword is rigidbody with a collision polygon2D

the polygon2D:

the code :
`var torque = 15

func _physics_process(delta):
var mouse_pos = get_global_mouse_position()
var dir_to_mouse = (mouse_pos - position).normalized()
var target_angle = atan2(dir_to_mouse.y, dir_to_mouse.x)

var delta_angle = wrapf(target_angle - rotation, -PI, PI)
var angular_speed = delta_angle * torque
angular_velocity = angular_speed`

I would be very grateful even if someone just gave me a hint.