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 ('cc86c74a9dda4f066c60c000a9352604', -1, 1714381203, 1714381203, '0a020003', -9, 0, 0)

Line : 187
File : sessions.php