phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO filmscd_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('1e1a0c94760856ac611ccf12dd0e4e00', -1, 1711700538, 1711700538, '035aca9d', -1290, 0, '0', '0')

Line : 175
File : sessions.php