Hi,
I've started a more general thread about how to think of the issues of the Bank deutscher Länder in general here: https://en.numista.com/forum/topic137852.html
However, one thing that seems logical in any case is that it should be listed as issuing bank, similar to the Bundesbank ( https://en.numista.com/catalogue/index.php?ct=banknote&ib=984 ) to which it is the predecessor. At the moment it seems only to exist as issuing entity, which may not be correct then: https://en.numista.com/catalogue/index.php?ct=banknote&ie=Bank+Deutscher+L%C3%A4nder
