Trouble - Limit rotation on Z-axis

I'm trying to limit rotation of 2D character on Z-axis. That character is game object with rigidbody component and I applied AddForce to move it. I used code on below and got a strange result when my character constantly and weirdly change its rotation on Z-axis for a lot of times per second. What is wrong in this code?

Thanks in advance.

 float horizRotate. ;
     float curRotate;
     
     void Start()
     {
         curRotate = transform.eulerAngles.z;
         
     }
         
         void LateUpdate()
     {
         horizRotate = curRotate;
     horizRotate = Mathf.Clamp(horizRotate, -45, 45);
     transform.rotation = Quaternion.Euler(0, 0, horizRotate);
     
     }