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 ('d90d42d78609a40be67186377c85d439', -1, 1711692208, 1711692208, '22e0215d', -4, 0, 0)

Line : 187
File : sessions.php