OSPF has to choose between resetting all of its adjacencies and using an IP address that is no longer present on the box, once you're removed it. Generally, all implementations choose the latter, keeping the ip address even though it's no longer configured. Note that if you changed your router id when an interface that was supplying it was removed from the routing table, you'd also have to do this when it fails, which means you'd have to restart your adjacencies if your highest numbered interface failed, and then restart them when it comes back up.
And a series of failures, each on the highest numbered interface, would be a disaster on a router with a large number of neighbors.
Russ already answered your second question (Why does the router keep the 129 router-id after it has been deleted?) but neglected to answer your first question (How do I get the router to accept the current highest ip as the router id?).
The cleanest way to change the OSPF router ID is to reboot the router. FWIW, EIGRP has the same problem, it's just not as obvious. Best practice is to carefully define your loopback addresses so the one you want is the highest loopback address (remember that the algorithm is to select the highest loopback address, and only select the highest real interface IP if there are NO loopback addresses defined.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...