An error occurred!Can't execute statement: Deadlock found when trying to get lock; try restarting transaction

SQL: select * from categories where catid = '6' and categories.catid != 150 order by category select * from categories where catid = '120' and categories.catid != 150 and topcatid = '6' select adid from ads_allwords, delta_ads_allwords where match('@(adtitle,addescription,allwords,location) "Nido" & "Castle" & "Hill"') order by adid desc limit 10000000 option max_matches=10000000