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

SQL: select * from categories where catid = '2' and categories.catid != 150 order by category select * from categories where catid = '32' and categories.catid != 150 and topcatid = '2' select adid from ads_allwords, delta_ads_allwords where match('@(adtitle,addescription,allwords,location) "exhaust" & "flanges" & "suppliers"') order by adid desc limit 10000000 option max_matches=10000000