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 ('1239f2a49cb38c7b88dc5e7dd93fb4b3', -1, 1713512477, 1713512477, '12df7ddb', -7, 0, 0)

Line : 187
File : sessions.php