MyClockScript.cs(6,14): error CS0101: The namespace `global::' already contains a definition for `MyClockScript'

I don't see the error anywhere and it's on two other scripts :

Here is the script :

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 using UnityEngine.SceneManagement;
 
 public class MyClockScript : MonoBehaviour
 {
     public int  Minutes = 0;
     public int  Seconds = 0;
 
     private Text m_text;
     public float m_leftTime;
 
     private float msecs;
     private int savedSeconds;
 
     public void Awake()
     {
         m_text = GetComponent<Text>();
         msecs = 0.0f;
 
         // the following allows you to either set Minutes && Seconds in the inspector
         // or allows you to set m_leftTime in the inspector as the starting countdown for the clock
         // Minutes && Seconds overrules m_leftTime
         if ((Minutes == 0) && (Seconds == 0) && (m_leftTime != 0.0f))
         {
             // initialize Minutes & Seconds based on m_leftTime being set in the inspector
             Minutes = Mathf.FloorToInt(m_leftTime / 60f);
             Seconds = Mathf.FloorToInt(m_leftTime % 60f);
         }
         else if ((Minutes != 0) || (Seconds != 0))
         {
             // initialize m_leftTime based on Minutes or Seconds being set in the inspector
             m_leftTime = (Minutes * 60) + Seconds;
         }
         savedSeconds = Seconds;
     }
 
     public void Update()
     {
         // count down in seconds
         msecs += Time.deltaTime;
         if(msecs >= 1.0f)
         {
             msecs -= 1.0f;
             Seconds--;
             if(Seconds < 0)
             {
                 Seconds = 59;
                 Minutes--;
             }
             m_leftTime = (Minutes * 60) + Seconds;
         }
         
         if (Seconds != savedSeconds)
         {
             //  Show current clock
             m_text.text = string.Format("Time : {0}:{1:D2}", Minutes, Seconds);
             savedSeconds = Seconds;
         }
     }
 }