IP Address Manager in version 10 (2012)- Comments column.

I'm trying to determine if I can make the comments placed in the comments column permanent until I decide to delete them.  Once I reserve a static IP address I place the reference ticket in the comments sections.  As long as the reserved IP is not used the comments remain.  As soon as the IP is used and pingable the comments disappear. I would like to keep the ticket number in the comments column as a reference  until the IP is no longer needed.  Is that possible?  Thanks in advance.