Changing Primary Key

JDE Community,

 I am working on a custom application that updates a custom table where the expiration date is part of the primary key. I am getting a table IO error when I change a expiration date. I understand the reason why I am getting the table error. The application cannot change the primary key.

 The JDE application P4104 and table F4104 also has the expiration data as part of the primary key. However, when the expiration date is change in F4104, the application P4104 does not issue an any database error. P4104 does not use a master business function to handle the database I/O for F4104. The P4104 application handles inserting and updating F4104.