API return to my angular app 2 employee identic

Question

My API returns this JSON, it's the same employee which is present 2 times in my database. I can't delete it in my database, also how can I print only 1 of them when I make my get in angular? Or when I make my *ngfor:"let e of employee", how can I print only the first result?

    getEmployee(id: string){
        return this.http.get<any>(this.localUrlAPI+"/employee/getEmployee/"+id)
        .pipe(map((res:any)=>{
          return res.Data;
        }))
      }

    {
      "Data":[
        {
        "IdEmployee": "1",
        "Name": "Jacob"
        }
        {
        "IdEmployee": "1",
        "Name" ; "Jacob"
        }
      ]
    }