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 ('32c334559d4a5d9e0614db94b3c36bf6', -1, 1728477623, 1728477623, '03ee524d', -11, 0, 0)

Line : 172
File : sessions.php