phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('d1570fbc8fd6f1985e1b3c5d6bc06c26', -1, 1711650727, 1711650727, '2ccab776', 5, 0, 0)

Line : 187
File : sessions.php