Modify macro to override if run twice and thrice

Inside your FOR loop after assigning a value to newName:

• Check if WorkSheets(newName) exists.
• If it does, delete it.
• In either case, you can now create the copy without fear of duplication.

Hello Chaturvedi, Santosh,

You can delete each previously generated sheet before copying the template again. Also clear the old list in column F before rebuilding it.

Replace your macro with this:

Sub CopyAndListSheets()
    Dim wsData As Worksheet
    Dim wsTemplate As Worksheet
    Dim wsNew As Worksheet
    Dim copyAfter As Worksheet
    Dim cell As Range
    Dim outRow As Long
    Dim lastRow As Long
    Dim newName As String
    On Error GoTo CleanFail
    Set wsData = ThisWorkbook.Worksheets("Data File")
    Set wsTemplate = ThisWorkbook.Worksheets("Master Template_Collectives")
    Set copyAfter = wsTemplate
    'Clear the previous list and hyperlinks from F5 downward.
    lastRow = wsData.Cells(wsData.Rows.Count, "F").End(xlUp).Row
    If lastRow >= 5 Then
        wsData.Range("F5:F" & lastRow).Hyperlinks.Delete
        wsData.Range("F5:F" & lastRow).ClearContents
    End If
    outRow = 5
    Application.DisplayAlerts = False
    Application.ScreenUpdating = False
    For Each cell In wsData.Range("C4:C15")
        newName = Trim$(CStr(cell.Value))
        If newName <> "" Then
            'Protect the original worksheets.
            If StrComp(newName, wsData.Name, vbTextCompare) = 0 _
               Or StrComp(newName, wsTemplate.Name, vbTextCompare) = 0 Then
                Err.Raise vbObjectError + 1000, , _
                    "The name '" & newName & _
                    "' is reserved for an original worksheet."
            End If
            'Delete the previous generated sheet if it exists.
            If WorksheetExists(newName, ThisWorkbook) Then
                ThisWorkbook.Worksheets(newName).Delete
            End If
            'Create a fresh copy from the original template.
            wsTemplate.Copy After:=copyAfter
            Set wsNew = ActiveSheet
            wsNew.Name = newName
            Set copyAfter = wsNew
            'Rebuild the list and hyperlink.
            With wsData.Cells(outRow, "F")
                .Value = newName
                .HorizontalAlignment = xlLeft
            End With
            wsData.Hyperlinks.Add _
                Anchor:=wsData.Cells(outRow, "F"), _
                Address:="", _
                SubAddress:="'" & Replace(newName, "'", "''") & "'!A1", _
                TextToDisplay:=newName
            outRow = outRow + 1
        End If
    Next cell
CleanExit:
    Application.DisplayAlerts = True
    Application.ScreenUpdating = True
    Exit Sub
CleanFail:
    MsgBox "The macro could not finish: " & Err.Description, _
           vbExclamation, "Copy and list sheets"
    Resume CleanExit
End Sub
Private Function WorksheetExists( _
    ByVal sheetName As String, _
    ByVal wb As Workbook) As Boolean
    Dim ws As Worksheet
    On Error Resume Next
    Set ws = wb.Worksheets(sheetName)
    On Error GoTo 0
    WorksheetExists = Not ws Is Nothing
End Function

This version can be run repeatedly. It deletes and recreates only the generated sheets, while keeping DataFile and MasterTemplate_Collectives unchanged.

Please note that replacing a sheet deletes any manual changes previously made on that generated sheet.

Microsoft references:

• Create or replace a worksheet
• Worksheet.Copy method