phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '06ef12a4e0232ad2138ee79dc6a63ba7' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('06ef12a4e0232ad2138ee79dc6a63ba7', -1, 1771006631, 1771006631, 'd849d897', -9, 0, 0)

Line : 187
File : sessions.php