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 ('b87b111f1f7bea52d0de3ff31c150355', -1, 1713452863, 1713452863, '12756b5a', 6, 0, 0)

Line : 187
File : sessions.php