I have an add on module like report and form for navision
they’re not perfect like the original from navision…
export/import sales order, sales invoice, credit memo, posted credit memo, posted invoice
it seems because of redundancy data, so while i imported to database,it would be clashed
so I want to empty the database for the linked data for sales order, sales invoice, credit memo, posted credit memo, posted invoice
which table must i delete?
is it a good idea if i delete direct through those tables?