phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9ef1e2a7462679c731e3fa4aa4d8a1ad' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9ef1e2a7462679c731e3fa4aa4d8a1ad', -1, 1539791192, 1539791192, '36e05922', 13, 0, 0)

Line : 198
File : sessions.php