If you want to add a new object-group and remove the current/old object-group, I would follow these steps.
show access-list random_name
access-list random_name line 20 permit tcp any any object-group old_object_group
define new object-group with new port ranges
add new line to acl random_name with new object-group. notice line number
access-list random_name line 19 permit tcp any any object-group new_object_group
Add any new acl lines in front/before the current/old acl lines. Test your changes, make sure the new acl lines show increasing hit count. Once you feel confident that the new acl lines are being used and not the current/old acl lines, remove the old acl lines.
no access-list random_name permit tcp any any object-group old_object_group
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...