Microsoft JScript runtime error '800a139e'

DB ERROR:INSERT INTO SESSION(ID,LASTACCESS,DATA) VALUES ('b19a8e2dc664ad81e700501471426bd5',NOW(),''),[MySQL][ODBC 3.51 Driver][mysqld-5.5.34]Duplicate entry 'b19a8e2dc664ad81e700501471426bd5' for key 'PRIMARY'

/lib/v2/ESBrain/Db.js, line 106