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 ('a808da2c18a3065a88c0b49a349ca2e3', -1, 1730415527, 1730415527, '03906ddf', -9, 0, 0)

Line : 195
File : sessions.php