How to remove duplicate elements in a tree?

[Redgars]

I know how to do this with a list, but I can’t with a tree, please help me.
del .gh (8.5 KB)

[ftzuk]

Assuming every branch duplicate always starts with the same first value…

duplicate branch.gh (11.4 KB)

[Redgars]

Thank you very much for an interesting solution

[inno]

you can also Member Index that, still assuming the filtering is based just on the very first item of each branch:

del_inno.gh (11.8 KB)

[Redgars]

Thanks for your help