MySQL Error Occurred

Error Message:
1062: Duplicate entry 'b4hepke85k777sbl97jf1c6kb6' for key 'PRIMARY'

SQL:
INSERT INTO CubeCart_sessions (`sessId`,`timeStart`,`timeLast`,`customer_id`,`ip`,`browser`) VALUES ('b4hepke85k777sbl97jf1c6kb6','1542228873','1542228873',0,'54.144.100.123','CCBot/2.0 (https://commoncrawl.org/faq/)');