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 ('3f9dcb4d760dac6cc69a5076a5f4843a', -1, 1714239380, 1714239380, '12779f96', 20, 0)

Line : 158
File : sessions.php