Purchase Order Receiver File F43121 MATC = 5

Hi

JDE9.0 tool rel: 8.98.44

I don't see a PO in P43214 Purchase Receipts Inquiry. In F43121 table, the MATC = 5. According to the documentation on the site, MATC 5 is created or updated manually. This is not done through EnterpriseOne software. I did a search in the F43121 table and in 2015, 79 records have MATC = 5. There is only one person here who can do a SQL and this is my supervisor.

Trust me, nobody asked my supervisor to change the MATC of these 9 records.

What is the cause of this problem? 

thank you

Lise