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 ('8c102e7de7d91e4e1a4a9c52bf7d0c10', -1, 1713268376, 1713268376, '0311064b', -4, 0, 0)

Line : 187
File : sessions.php