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 ('4591e3a8ff3d0e57ca122df7240d0221', -1, 1714016496, 1714016496, '12bfbd55', -11, 0, 0)

Line : 187
File : sessions.php