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 ('a6cc60fa7eba27e9368fd5a2e8b9fd3c', -1, 1713482994, 1713482994, '12bdb44c', 7, 0, 0)

Line : 187
File : sessions.php