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 ('8c9f1d1d4dfd4def6c9a8359def9063d', -1, 1714206217, 1714206217, '0a020003', -8, 0, 0)

Line : 187
File : sessions.php