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 ('9179d36a06d3047a6317cb6a1870fe1c', -1, 1711716075, 1711716075, '2cd66ab8', -10, 0, 0)

Line : 187
File : sessions.php