The only remedy seems to be to go to an earlier version of the file - saved before you tried to add the reference.
If you do enough coding to use a third party code tester, and need to save many "micro" versions, here's what I use in My Personal.xls 
Private Sub Workbook_BeforeClose(Cancel As Boolean)
'If I forget to save before closing. Provides a warning, in case I really don't want the latest changes.
    If Not Me.Saved Then Me.Save
End Sub

Private Sub Workbook_BeforeSave(ByVal SaveAsUi As Boolean, Cancel As Boolean)
'Everytime the File is saved
    Me.SaveCopyAs ("E:\COMPUTING\Programming\_VBA\MyPersonal\" & CDbl(Now) & "- Personal.xls")
End Sub
When I actually want to SaveAs a new version, I just do that normally from the Menu.