Namespace error....what???

After I updated my Unity version from 5.1.1p2 to 5.2.3, I've been having so many frustrating problems, many of which I've already resolved, but this is one of the remaining ones. For some reason I keep getting the error:

Assets/Scripts/Mecanim_Control_melee.cs(5,14): error CS0101: The namespace global::' already contains a definition for Mecanim_Control_melee'

And I have no idea why. Here's the code in that script:

 public class Mecanim_Control_melee : MonoBehaviour {
     public Animator animator;
     public bool leftMouseClick=false;
     public bool rightMouseClick=false;
     public bool canControl=true;
     private float shift_axis_late;
     public float leftMouseClicks;
 
     private float animLayer2;
     public float inputX;
     public float inputY;
     public float inputJump;
 
 
     
 
     void Start () {
         animator = GetComponent<Animator>();
 
     }
     
     void OnAnimatorIK(){
         animator.SetLayerWeight(1, 1f);
         animator.SetLayerWeight(2, animLayer2);
         
         if(canControl){
             Vector3 camDir =  transform.position - Camera.main.transform.position;
             Vector3 lookPos = transform.position + camDir;
             lookPos.y = transform.position.y -(Camera.main.transform.position.y - transform.position.y) + 10f;
             //animator.SetLookAtWeight(0.2f, 0.2f, 0.8f, 0.99f);
             //animator.SetLookAtPosition(lookPos);
 
         }
         
         
     
     }
     
     void Update () {
     
         if(leftMouseClick){
             StartCoroutine("TimerClickTime");
 
         }
         
         if(animator){    
             
             shift_axis_late = Mathf.Clamp((shift_axis_late - 0.005f), 0.0f, 1.1f);
             animLayer2 = Mathf.Clamp((animLayer2 - 0.01f), 0.0f, 1.0f);
             
             animator.SetBool("LeftMouseClick", leftMouseClick);
             
             animator.SetFloat("LeftShift_axis", shift_axis_late);
             animator.SetFloat("Axis_Horizontal", inputX);
             animator.SetFloat("Axis_Vertical", inputY);
             animator.SetFloat("Jump_axis", inputJump);
             animator.SetBool("RightMouse", rightMouseClick);
 
         }
         
         
         if(canControl){
                     
         
             inputX = Input.GetAxis("Horizontal");
             inputY = Input.GetAxis("Vertical");
             inputJump = Input.GetAxis("Jump");
             leftMouseClick = Input.GetMouseButtonDown(0);
         
             
     
                 
         if(Input.GetKeyDown(KeyCode.LeftShift)){
             shift_axis_late += 0.25f;
             
         }
         
     
         if(Input.GetAxis("Fire2")>0){
                 rightMouseClick=true;
                 animLayer2=0.5f;
         }
             else{
                 rightMouseClick=false;
             }    
         
 
 
         //sync animator Y_axis rotations with Main Camera    
         if(inputX+inputY!=0){
             Vector3 camDir =  transform.position - Camera.main.transform.position;
             Vector3 lookPos = transform.position + camDir;
             lookPos.y = transform.position.y;
             transform.LookAt(lookPos);
         }
 
         }
         
     }
         
 
 
 
     void FightCombo(){   //every left mouse click +1 to animation number counter
 
         leftMouseClicks += 1f;
         animator.SetFloat("LeftMouseClicks", leftMouseClicks);
 
         if(leftMouseClicks>2f){
             leftMouseClicks = 0f;
         }
 
     }    
 
     IEnumerator TimerClickTime(){  //timer, few seconds after click mouse bool leftMouseClick = true
     
         yield return new WaitForSeconds(0.1f);
         leftMouseClick=false;
         yield return null;
     
     }
     
     
     IEnumerator InAction(){ //recieve message from fight animation in mecanim controller
         
         yield return null;
     }
     
     
     IEnumerator AnimationEnd(){//recieve message from fight animation in mecanim controller
         
         yield return null;
     }
 
 
 }//The END
 

Any help would be seriously appreciated!!