Dynamics NAV has one big key word (among others), called post . If you read the word post anywhere in the application or see the following icon, it means that if you click on the button, a routine will be run and this will lead to posted documents and posted entries that are on their last stage. It is the trusted data that won't change anymore.
As explained in The data model section of this chapter, Dynamics NAV has some tables called
Cust. Ledger Entries,
Vendor Ledger Entries,
Item Ledger Entries, and so on) that correspond to transactions related to master data. The only way to insert data into entry ...