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 ('245e1590ddce061d6b01c19d0b9e9390', -1, 1713964006, 1713964006, '038e626c', -7, 0, 0)

Line : 187
File : sessions.php