BE BPost has been integrated into BNP Paribas Fortis.
As a consequence, BPost connector has been set to status 98 (deleted) and will be removed in next version.
If you have client using BPost, you have to delete the account (see DELETE this API endpoint) and ask the user to connect it again using BNP Paribas Fortis connector.
IBAN are not changing so you'll keep the history of transactions in Gateway mode.