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 ('85247f7beecb9aba55a3645135e041d1', -1, 1711649600, 1711649600, '035abb0b', -1, 0, 0)

Line : 187
File : sessions.php