Hi @Retired_mod 

Thank you for your reponse. I am aware that you can change your DELTA with de DDL statements, but in our case we write directly to storage and not to the unity catalog. So when a external table is created referring to a external location it takes the version at that specific moment. When the schema is changed afterwards the external table is not update because it is still referring to a previous version. That's also what the tabel property delta.lastUpdateversion is saying. So in this case it looks like you have to drop and create the external table so the delta.lastUpdateversion is the correct one.