phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'BP_sessions.session_user_id'

INSERT INTO BP_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('b6e287936642142a0c29a6bde8c3301a', -1, 1762627761, 1762627761, '12610e5b', -2, 0, 0)

Line : 193
File : sessions.php