How do I prevent data repetition in mvc?

Question

Hello there. I am drawing data from the database according to a certain condition. however, the query repeats data in some cases and lists duplicate data. How do I prevent this?

 

TekrarAraV View;

@model IEnumerable<cmsV0._1.Models.vw_get_callLog>
@{
    ViewBag.Title = "Tekrar Ara";
    string userRols = ViewBag.userRoler;
    int i = 1;

}
<br />
    <form action="/Rapor/TekrarAraV" method="get">
        <input type="text" name="date" id="date" class="form-control" />
        <input type="submit" value="Getir" />
    </form>



<div style="display:none;">@DateTime.UtcNow.AddHours(3).AddMinutes(5).ToString("dd/MM/yyy")</div>
<br /><br />
<table class="table">
    <thead>
        <tr>

            <th></th>
            <td>
                <b style="font-size:medium;padding-left:15px;">Ad</b>
            </td>
            <td>
                <b style="font-size:medium;">Telefon</b>
            </td>
            <td>
                            <b>Mail</b>
            </td>
            <td>
                <b style="font-size:medium;">Durum</b>
            </td>
            <td style="color:red;font-size:medium;width:20%;text-align:center;">
                <b style="font-size:medium;">Aranacak Tarih</b>
            </td>
            <td>
                <b style="font-size:medium;">Notu</b>
            </td>
            @if (userRols == "admin")
            {
                <td>
                    <b style="font-size:medium;">Sorumlu TMK</b>
                </td>
            }
        </tr>
        @foreach (var item in Model)
        {
            <tr>
                <td>
                    @i
                </td>
                <td style="padding-left:20px;">
                    @item.flowName
                </td>
                <td>
                    @item.flowPhone
                </td>
                <td>
                    @item.flowEMail
                </td>
                <td>
                    @item.firstStatusText
                </td>
                <td style="text-align:center;">
                    @Convert.ToDateTime(item.callDate).ToString("dd/MM/yyy")
                    <span style="margin-left:10px;">@item.tekrarSaat</span>
                </td>
                <td>
                    @item.notes
                </td>

                @if (userRols == "admin")
                {
                    <td>
                        @item.tmkName
                    </td>
                }
                <td>
                    @Html.ActionLink("Çagri Aç", "Edit", "flows",new { id = item.flowId }, new { target = "_blank" })
                </td>

            </tr>
            i++;
        }
    </thead>
</table>
<script>
    function filterDate() {
        var input, filter, table, tr, td, i;
        input = document.getElementById("flowSearchN");
        filter = input.value.toUpperCase();
        table = document.getElementById("calendarM");
        tr = table.getElementsByTagName("tr");
        for (i = 0; i < tr.length; i++) {
            td = tr[i].getElementsByTagName("td")[3];
            if (td) {
                if (td.innerHTML.toUpperCase().indexOf(filter) > -1) {
                    tr[i].style.display = "";
                } else {
                    tr[i].style.display = "none";
                }
            }
        }
    }
</script>

RaporController;

public ActionResult TekrarAraV(DateTime? date)
       {
           userData = userControl(); ViewBag.uData = userData;
           string userName = userData.tmkName;

           using (smartCMSEntities ft = new smartCMSEntities())
           {
               string userRol = userData.role;
               ViewBag.userRoler = userRol;


               if (date == null && userRol == "admin")
               {
                   return View(ft.vw_get_callLog.Where(x => x.firstStatusText == "Tekrar Ara" & x.callDate != null & x.callDate == DateTime.Today).ToList());
               }

               else if (date == null)
               {
                   return View(ft.vw_get_callLog.Where(x => x.firstStatusText == "Tekrar Ara" & x.callDate != null & x.tmkName == userName & x.callDate == DateTime.Today).ToList());
               }

               else if (userRol == "admin")
               {
                   return View(ft.vw_get_callLog.Where(x => x.firstStatusText == "Tekrar Ara" & x.callDate != null & x.callDate == date).ToList());
               }
               else
               {
                   return View(ft.vw_get_callLog.Where(x => x.firstStatusText == "Tekrar Ara" & x.callDate != null & x.tmkName == userName & x.callDate == date).ToList());
               }

           }
       }