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 ('6670f51f1675d0c042f1546e973a20c1', -1, 1713411294, 1713411294, '03102f0e', 2, 0, 0)

Line : 187
File : sessions.php