phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sub_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('1d8466c2c6606d8216b8c18283b67bc1', -1, 1714514031, 1714514031, '127787ca', -8, 0, 0)

Line : 187
File : sessions.php