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 ('5afacee7a1f8cf28e76e8c742bee5612', -1, 1711629737, 1711629737, '2cdd2b58', -10, 0, 0)

Line : 187
File : sessions.php