phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO laserstarker_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('14c0df83f8cc7f54156656e58cc4bbd1', -1, 1711702548, 1711702548, '22e5ef52', 1, 0, '0', '0')

Line : 175
File : sessions.php