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 ('33553ac21377d85689035abd747dcfcc', -1, 1759710745, 1759710745, 'd849d88f', -4, 0, 0)

Line : 283
File : sessions.php