Fatal error, run database recovery

we meet the error like these,

[Sun Mar 04 19:00:50 2007] [error] [client 192.168.1.30] (20014)Error
string not specified yet: Berkeley DB error for filesystem
'/var/repos/cook/db' while opening 'nodes' table:\nDB_RUNRECOVERY:
Fatal error, run database recovery
[Sun Mar 04 19:00:50 2007] [error] [client 192.168.1.30] Could not
fetch resource information. [500, #0]
[Sun Mar 04 19:00:50 2007] [error] [client 192.168.1.30] Could not
open the requested SVN filesystem [500, #160029]
[Sun Mar 04 19:00:50 2007] [error] [client 192.168.1.30] Could not
open the requested SVN filesystem [500, #160029]

any idea what's wrong? I can not check out now.

-- 
perl -e 'print unpack(u,"62V5N\"FME;G\!E<FQ`9VUA:6PN8V]M\"\@``
")'
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