MySQL Error Occurred

Error Message:
1062: Duplicate entry 'racn6mmpn36apt7jec75lscri1' for key 'PRIMARY'

SQL:
INSERT INTO CubeCart_sessions (`sessId`,`timeStart`,`timeLast`,`customer_id`,`ip`,`browser`) VALUES ('racn6mmpn36apt7jec75lscri1','1542230487','1542230487',0,'54.144.100.123','CCBot/2.0 (https://commoncrawl.org/faq/)');