Adding, modifying, or removing a VLAN from the VTP server will cause the revision number to change. Another possible way is if a Client gets a higher revision number than the server. If this happens the server will take take the revision number and the VLAN information from the client and advertise the information to everyone in the VTP domain.
VTP password, domain name, and version number don't propagate. Domain name change resets the revision number. Only creating or deleting a VLAN will increase the revision number (here's your answer ^^^)
It issues an advertisement request for new VLAN information.
revision number pruning mode
You must first delete all of its configuration. Higher revision number, for example, on a switch can result in a disaster when re-deployed in a VTP network. However, if all of the switch on the VTP network is set to transparent mode, there should be no problem.
All VLANs that are configured on this switch will be sent to all other switches in the same VTP domain. Adding this switch to the network will cause no disruption in the VTP domain operations if the rest of the switches in the same domain have a higher configuration revision number.
Set VTP revision number to a smaller number
Select the correct VTP mode and version. Configure the switch with the name of the new management domain. Verify that the switch has a lower configuration revision number than the other switches in the new domain.
Select the correct VTP mode and version. Configure the switch with the name of the new management domain. Verify that the switch has a lower configuration revision number than the other switches in the new domain.
VTP server mode and VTP transparent mode.
The VTP domain cannot be modified.
VTP is Vertical Trading Point