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 ('6dad1c3b31d77821f7a6604660380d95', -1, 1730418799, 1730418799, '12e2a4d8', -1280, 0, 0)

Line : 195
File : sessions.php