[Koha] [error] select distinct

[T & J Kotula]

Hi,

Could someone tell me what could be the cause of the following error. 
The logs seem to full of them. At the time I was using koha2.2.2 on RH8.

[error] [client 192.168.5.1] Q2 : select distinct m1.bibid from 
biblio,biblioitems,marc_biblio,marc_word as m1,marc_word as m2 where 
biblio.biblionumber=marc_biblio.biblionumber and 
biblio.biblionumber=biblioitems.biblionumber and 
m1.bibid=marc_biblio.bibid and (m1.bibid=m2.bibid) and ((m1.word  like 
'last' and m1.tagsubfield in ('245a'))and (m2.word like 'battle' and 
m2.tagsubfield in('245a'))) order by biblio.title ASC term is  The last 
battle  at /usr/local/koha/intranet/modules/C4/SearchMarc.pm line 280., 
referer: http://192.168.5.22:8080/cgi-bin/koha/acqui.simple/addbooks.pl


Many thanks

tomasz kotula.