phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_002sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('b20e68b5d535ec2e9e256b7114de758e', -1, 1736571862, 1736571862, '0390622b', -4, 0, 0)

Line : 216
File : sessions.php