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 ('a9e7c70de7a7d62f07aca66d7f7300a7', -1, 1730419818, 1730419818, '12bdb6d3', -9, 0, 0)

Line : 195
File : sessions.php