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) VALUES ('b9ae5745ee62f8fd987101c30c6c20a2', -1, 1714344417, 1714344417, '03163df6', 20, 0)

Line : 158
File : sessions.php