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 ('740b8a2fb24cd162f65ce47e7afdec6d', -1, 1714304446, 1714304446, '03810dc9', -4, 0)

Line : 158
File : sessions.php