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 ('c8f9bcb18a03b15f21f3ac5a55ef0fd6', -1, 1714761799, 1714761799, '0389b70e', -9, 0)

Line : 158
File : sessions.php