Update symbol with added pad

Hello,

 I'm working with Orcad Professional 17.2.

I've a pcb 100% routed. I've to add a hole into a symbol.

I edited symbol in library and generated .psm file.

If I try to update (with "Update  symbol padstack from library") and a error occurs:

'SKIIP' symbol starting to refresh:

     ERROR(SPMHNI-271): 1 pins found in library symbol, but missing from the symbol in the physical design. They are:

            33

Anyone can help me?
Thanks
Stefano