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 ('a81f48e0f363e38581fb8f2a566024ef', -1, 1730460649, 1730460649, '0389b1b3', -1, 0, 0)

Line : 195
File : sessions.php