Paste special to a column with drop down list?

[NYC_Rick2008]

I was trying to write VBA code to paste special value of one column to a column under seperate worksheet. The destination column has a drop-down list feature and the paste sepcial I used just overwrote the drop-down list feature but I want to keep the drop-down list feature. Anyone can assist?

below is my coding:

Inputbook.Worksheets("PortfolioData").Range("CD8:CD20000").Select
Selection.Copy

destsheet.Range("AA8").PasteSpecial _
Paste:=xlPasteValues
Application.DisplayAlerts = False
Application.DisplayAlerts = True