15961:20130815:175138.939 [Z3005] query failed: [0] columns hostid, name are not unique [insert into httptest (httptestid,name,delay,variables,agent,authentication,http_user,http_password,hostid,http_proxy,retries) values (79,'check_http_01',300,'','Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1',1,'22','22',59459,'',1);
]
15961:20130815:175138.940 failed to update local proxy configuration copy: database error

It happened because of check_http_01 was removed and added new http test with the same name.