I have never dealt with DSA so I am uncertain in general about this, but I would never let my ignorance get in the way of my providing some answer.
I believe this always happens the very first time a client requests it’s mailbox site from a new relay, which in this case would be the client on the root server talking to the DSA root server itself.
This should indicate that the problem is now fixed, but that doesn’t seem to address your issue.
Version 0 should mean that the mailbox site is empty at this point, and has nothing in it.
This seems like it could be the greater issue.
But this suggests to me that this might be normal and maybe it would work if this part worked.
I wonder if there is some issue with the DSA replication itself. ( RE: @JasonWalker 's comment )
Can you connect the console to this server and target an action to it there? I wonder if that would make a difference.
You may need to file a PMR with IBM for this: How to ask for IBM product help: PMRs, RFEs, and more