phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ab28c3635971f1e45ddc803019914db3' 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 ('ab28c3635971f1e45ddc803019914db3', -1, 1769984386, 1769984386, 'd849d822', -4, 0, 0)

Line : 187
File : sessions.php