What does this error message mean:
I do have multiple securities with the same ISIN because a single ISIN can trade in multiple currencies depending on the broker being used.
What do I do to solve this problem?
It means that you
Afaik only manual booking is possible in this case.
I have manually booked the trades. Luckily there were only a few.
It would be good to solve this issue. Also it would be good to be able to csv import Securities (not just trades) with the same ISIN but different tickers. At the moment you have to manually book those securities too.
Can anyone fix this problem in a new update?
I doubt it. The importer needs identifier in order to distinguish.
Most documents I know doesn’t have the ticker, so there is no possibility to distinguish when ISIN and WKN are the same.