Photo Supreme

Thanks for your quick reply Hert! I applied your advice already to delete a catalogue label. Also the fruitful discussion in the forum about label and keyword difference do not solve my problem. I cannot delete any Label. So I am pretty sure that it is Not PSU but either a User problem or I ...

First the import of LR keywords worked. I shifted the same within psu given structure (People, events). I can cut, copy and move the keywords, but there is no way to delete any keyword. To be sure I created an empty database and just added "test" under "Events". I cannot delete this new term anymore ...