LTM1600 - How to alter the default 'external' VLAN tag

Greetings all, for quite some time now I have used the default 'external' VLAN that came setup on our 1600's for the external VIPs. We are making some infrastructure changes, and the problem is that I want to alter that VLAN's tag from the default of 4093 to something else so that I can actually begin using it as a tagged interface (right now it is untagged on the switch).

 

 

When I go to alter the VLAN, it won't let me. Both the command line and web interface won't let me make that change. I don't want to have to delete it since it would require me to go through and alter all our Virtual Servers that use it. Is there any kind of work around for this?

 

 

Thanks!