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 ('fe9d6651b720acc094b90ddb90e91977', -1, 1730446002, 1730446002, '1277fda8', -1, 0, 0)

Line : 195
File : sessions.php