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 ('f4d98fe41f12305522e7e73538a63400', -1, 1713997368, 1713997368, '0390fda1', -4, 0, 0)

Line : 187
File : sessions.php