Parse data - Overwrite lines with updated data

[Scifo]

Hi,
I have a macro, mostly from modifying and building on some help i got on this forum.
The Macro is designed to take a table of sales and then parse it into different sheets depending on the header.
In Column 1 I am changing the week number.
What I cannot manage to is adapt the macro so that if I enter a week number a second time it will overwrite the current data. (at the moment I can have two weeks 2')
I think this is a step beyond me at the moment..

Sub parse_data()
Dim lr As Long
Dim ws As Worksheet
Dim vcol, i As Integer
Dim icol As Long
Dim myarr As Variant
Dim title As String
Dim titlerow As Integer
 Range("B2:H150").Select
    Selection.replace What:="/", Replacement:=" ", LookAt:=xlPart, _
        SearchOrder:=xlByRows, MatchCase:=False, SearchFormat:=False, _
        ReplaceFormat:=False, FormulaVersion:=xlReplaceFormula2
         Selection.replace What:="Groups 1 to 5 Markets Project", Replacement:="Project A", LookAt:=xlPart, _
        SearchOrder:=xlByRows, MatchCase:=False, SearchFormat:=False, _
        ReplaceFormat:=False, FormulaVersion:=xlReplaceFormula2

       
        
'Filtered Column Number
vcol = 2
'Worksheet to be split
Set ws = Sheets("Sheet1")
lr = ws.Cells(ws.Rows.Count, vcol).End(xlUp).Row
title = "A1:M1"
titlerow = ws.Range(title).Cells(1).Row
icol = ws.Columns.Count
ws.Cells(1, icol) = "Unique"
For i = 2 To lr
On Error Resume Next
If ws.Cells(i, vcol) <> "" And Application.WorksheetFunction.Match(ws.Cells(i, vcol), ws.Columns(icol), 0) = 0 Then
ws.Cells(ws.Rows.Count, icol).End(xlUp).Offset(1) = ws.Cells(i, vcol)
End If
Next
myarr = Application.WorksheetFunction.Transpose(ws.Columns(icol).SpecialCells(xlCellTypeConstants))
ws.Columns(icol).clear
  For i = 2 To UBound(myarr)
         ws.Range(title).AutoFilter field:=vcol, Criteria1:=myarr(i) & ""
 If Evaluate("=ISREF('" & myarr(i) & "'!A1)") Then GoTo SHEET_EXISTS
        If Not Evaluate("=ISREF('" & myarr(i) & "'!A1)") Then
            Sheets.Add(after:=Worksheets(Worksheets.Count)).Name = myarr(i) & ""
        Else
            Sheets(myarr(i) & "").Move after:=Worksheets(Worksheets.Count)
        End If
        ws.Range("A" & titlerow & ":A" & lr).EntireRow.Copy Sheets(myarr(i) & "").Range("A1")

GoTo NEW_SHEET
SHEET_EXISTS:
       ws.Range("A" & titlerow & ":M" & lr).Offset(1).Copy
        Sheets(myarr(i) & "").Range("A" & Rows.Count).End(xlUp).Offset(1).PasteSpecial Paste:=xlPasteValuesAndNumberFormats
NEW_SHEET:

      Sheets(myarr(i) & "").Columns.AutoFit
           If Sheet1.Range("r2").Value = 1 Then
    Application.Run ("Module2.Button4_Click")
    ElseIf Sheet1.Range("r2").Value < 1 Then
    End If
    
     

Next
'Remove filter
ws.AutoFilterMode = False
ws.Activate
End Sub