As per Microsoft: "This issue may occur if you remove the Exchange 2000 Server routing group master and do not designate another Exchange Server computer to be the routing group master". See ME841666
to resolve this problem.
From a newsgroup post: "I got a new box that I wanted to move my exchange 2003 deployment too. I setup the new box, installed exchange on it, moved all the mailboxes, and set all the settings. I disabled the Exchange services on the original box. Things still worked. Like a dummy, I deleted the original server in System Manager. After that, Exchange on the new box failed to start and this event was being logged. A friend of mine, a developer on the Exchange team gave me the following tips that helped me to fix the problem:
1. Go into ESM (Exchange System Manager).
2. Right click on the top-level node (org) and select properties.
3. In the dialog box, check "Display routing groups" and "Display administrative groups" (if they are not already checked).
4. If they were not already checked, you will be prompted that you have to restart ESM for the settings to take affect. Do so.
5. Click on Administrative Groups.
6. Click on First Administrative Group (or whatever you called it).
7. Click on Routing Groups.
8. Click on First Routing Group (or whatever you called it).
9. Click on Members.
10. The new machine will be listed (and the old one will not). Right click on the new machine and set it to be "master".
11. Restart the Exchange services on the new machine".