phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6ab01c401dd1f79e4f8da5396a11fb8b' 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 ('6ab01c401dd1f79e4f8da5396a11fb8b', -1, 1766309419, 1766309419, 'd849d82e', 4, 0, 0)

Line : 187
File : sessions.php