Starting with v.2020, the definition of each Country can have primary Code and additional "Intrastat" Code.
The primary code is used for VAT and VIES reporting purposes.
The Intrastat code is used for Intrastat reporting purposes. If the special Intrastat Code field is not filled, the primary code is used.
The change was required, because VAT and Intrastat reporting used different codes for some countries (for example - Greece).