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 ('a6407b679fc0439f2b7f02ba71b06ae2', -1, 1714016316, 1714016316, '12df6b95', -4, 0, 0)

Line : 187
File : sessions.php