Why did IP of my Tor router publish wrong?

[Soviet Union <unionsovietunion@xxxxxxx>]

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I have the next records in /var/log/tor/log:
Apr 07 15:46:10.228 [notice] Our IP Address has changed from
91.78.106.252 to 83.237.187.107; rebuilding descriptor (source
: 194.109.206.212).
Apr 07 15:47:14.657 [notice] Self-testing indicates your ORPort is
reachable from the outside. Excellent. Publishing server
 descriptor.
Apr 07 15:49:19.237 [notice] Performing bandwidth self-test...done.

When I see here
https://torstatus.kgprog.com/router_detail.php?FP=dbaddb4943ede3a686902b0798f3038cca1e828f
I find the next information:
Router Name:     SovietUnion
Fingerprint:     DBAD DB49 43ED E3A6 8690 2B07 98F3 038C CA1E 828F
Contact:     1024D/E17EB50C Soviet Union <unionsovietunion AT aol dot com>
IP Address:     83.237.198.224
Last Descriptor Published (GMT):     2010-04-08 16:20:12


But my router has had that IP on 04/05 April, not on 2010-04-08 16:20:12

Could it be any attack from any enemy against the Tor-net?


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