In other words, Duplicate Collection could link local ID into a linked one... Nasty. ;) Add checks that found parent is not a linked data-block (and try to find a fall-back one if this is the case).
In other words, Duplicate Collection could link local ID into a linked one... Nasty. ;) Add checks that found parent is not a linked data-block (and try to find a fall-back one if this is the case).