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 ('729d0dc7c3c41cf9f5f4647d7ccd417c', -1, 1711718196, 1711718196, '22e4d5b7', -10, 0, 0)

Line : 187
File : sessions.php