rt-shredder error

# /opt/rt4/sbin/rt-shredder --plugin "Tickets=query,Status = 'Resolved' AND LastUpdated < '180 days ago';limit,10" --sqldump rt-resolved_180_days_ago-20120920-2.sql
SQL dump file is '/opt/rt4/var/data/RT-Shredder/rt-resolved_180_days_ago-20120920-2.sql'
Next 10 objects would be deleted:
        RT::Ticket-10 object
        RT::Ticket-11 object
        RT::Ticket-12 object
        RT::Ticket-13 object
        RT::Ticket-14 object
        RT::Ticket-15 object
        RT::Ticket-16 object
        RT::Ticket-17 object
        RT::Ticket-18 object
        RT::Ticket-19 object
Do you want to proceed? [y/N] y
[Thu Sep 20 21:05:07 2012] [crit]: Couldn't wipeout object: Wrong link link_meta, no record for RunsOn

Trace begun at /opt/rt4/sbin/../lib/RT/Shredder/Link.pm line 77
RT::Link::__DependsOn('RT::Link=HASH(0x7009bd0)', 'Shredder', 'RT::Shredder=HASH(0x1b5b410)', 'Flags', 1, 'Dependencies', 'RT::Shredder::Dependencies=HASH(0x70bb7b0)') called at /opt/rt4/sbin/../lib/RT/Shredder/Record.pm line 112
RT::Record::Dependencies('RT::Link=HASH(0x7009bd0)', 'Shredder', 'RT::Shredder=HASH(0x1b5b410)') called at /opt/rt4/sbin/../lib/RT/Shredder.pm line 586
RT::Shredder::_Wipeout('RT::Shredder=HASH(0x1b5b410)', 'Object', 'RT::Link=HASH(0x7009bd0)') called at /opt/rt4/sbin/../lib/RT/Shredder.pm line 596
RT::Shredder::__ANON__('RT::Shredder::Dependency=HASH(0x701ea30)') called at /opt/rt4/sbin/../lib/RT/Shredder/Dependencies.pm line 146
RT::Shredder::Dependencies::List('RT::Shredder::Dependencies=HASH(0x6ec8ad0)', 'WithFlags', 1, 'WithoutFlags', 4112, 'Callback', 'CODE(0x6ec8e30)') called at /opt/rt4/sbin/../lib/RT/Shredder.pm line 597
RT::Shredder::_Wipeout('RT::Shredder=HASH(0x1b5b410)', 'Object', 'RT::Ticket=HASH(0x6fe6330)') called at /opt/rt4/sbin/../lib/RT/Shredder.pm line 555
eval {...} at /opt/rt4/sbin/../lib/RT/Shredder.pm line 552
RT::Shredder::Wipeout('RT::Shredder=HASH(0x1b5b410)', 'Object', 'RT::Ticket=HASH(0x6fe6330)') called at /opt/rt4/sbin/../lib/RT/Shredder.pm line 544
RT::Shredder::WipeoutAll('RT::Shredder=HASH(0x1b5b410)') called at /opt/rt4/sbin/rt-shredder line 174
eval {...} at /opt/rt4/sbin/rt-shredder line 174 (/opt/rt4/sbin/../lib/RT.pm:341)
Couldn't wipeout object: Wrong link link_meta, no record for RunsOn

Trace begun at /opt/rt4/sbin/../lib/RT/Shredder/Link.pm line 77
RT::Link::__DependsOn('RT::Link=HASH(0x7009bd0)', 'Shredder', 'RT::Shredder=HASH(0x1b5b410)', 'Flags', 1, 'Dependencies', 'RT::Shredder::Dependencies=HASH(0x70bb7b0)') called at /opt/rt4/sbin/../lib/RT/Shredder/Record.pm line 112
RT::Record::Dependencies('RT::Link=HASH(0x7009bd0)', 'Shredder', 'RT::Shredder=HASH(0x1b5b410)') called at /opt/rt4/sbin/../lib/RT/Shredder.pm line 586
RT::Shredder::_Wipeout('RT::Shredder=HASH(0x1b5b410)', 'Object', 'RT::Link=HASH(0x7009bd0)') called at /opt/rt4/sbin/../lib/RT/Shredder.pm line 596
RT::Shredder::__ANON__('RT::Shredder::Dependency=HASH(0x701ea30)') called at /opt/rt4/sbin/../lib/RT/Shredder/Dependencies.pm line 146
RT::Shredder::Dependencies::List('RT::Shredder::Dependencies=HASH(0x6ec8ad0)', 'WithFlags', 1, 'WithoutFlags', 4112, 'Callback', 'CODE(0x6ec8e30)') called at /opt/rt4/sbin/../lib/RT/Shredder.pm line 597
RT::Shredder::_Wipeout('RT::Shredder=HASH(0x1b5b410)', 'Object', 'RT::Ticket=HASH(0x6fe6330)') called at /opt/rt4/sbin/../lib/RT/Shredder.pm line 555
eval {...} at /opt/rt4/sbin/../lib/RT/Shredder.pm line 552
RT::Shredder::Wipeout('RT::Shredder=HASH(0x1b5b410)', 'Object', 'RT::Ticket=HASH(0x6fe6330)') called at /opt/rt4/sbin/../lib/RT/Shredder.pm line 544
RT::Shredder::WipeoutAll('RT::Shredder=HASH(0x1b5b410)') called at /opt/rt4/sbin/rt-shredder line 174
eval {...} at /opt/rt4/sbin/rt-shredder line 174