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 ('53bcdea87d0f3e8476b5c4ac8342704f', -1, 1713581816, 1713581816, '0390194a', -4, 0, 0)

Line : 187
File : sessions.php