phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'f4b0624b6299254f62030dbde987dcaf' 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 ('f4b0624b6299254f62030dbde987dcaf', -1, 1770256428, 1770256428, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php