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 ('ad4b7b21a85bac08354d485545d2f8f0', -1, 1714517699, 1714517699, '0390a174', -8, 0, 0)

Line : 187
File : sessions.php