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 ('0d9483ca0470b2f3247acc42d932e1c0', -1, 1713884992, 1713884992, '03836ea9', -7, 0, 0)

Line : 187
File : sessions.php