phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('6ac1555786b868d839eaff69584af09d', -1, 1737552827, 1737552827, '12e2a5ea', 5, 0, 0)

Line : 187
File : sessions.php