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 ('211e04c9f3f422f5fc11c986e6c1c142', -1, 1761211203, 1761211203, 'd849d81b', -9, 0, 0)

Line : 172
File : sessions.php