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 ('038a6f9529f8e4b37752a7fc6638d0b6', -1, 1713910588, 1713910588, '0d3b52a7', 0, 0, 0)

Line : 187
File : sessions.php