Re: Import 2 number list with identic Parent and Code
I've seen this issue a number of times!
There are a couple of things happening:
When cloning/copying list items from one model to another, move one level at a time into the respective list that they belong in. Each level copied should exclude (by filter) the parent items... so they aren't added to the child list erroneously.
Where a parent list uses the same/overlapping codes as a child, I generally seek to architect in a way that avoids this (if possible). Having some kind of code with numbered lists is helpful for a lot of reasons. In these cases, consider the frequency of updating in relation to the importance of the code value. For example, if you have a need to update the list frequently using an automated process, then generate a code value that you know will never conflict (perhaps by adding a prefix to it). If the updates are infrequent & the code value needs to be kept very simple, then resolve kickouts manually.
I see the issue of child list codes conflicting with parent list codes during bulk loads as a bug.