List bug ?

http://webix.com/snippet/d8aa5772

When you add twice the same Item in the list, it’s visible only one time. That’s correct. but you can’t remove it anymore, because it has been added more one time. I think it’s a bug.

Thanks

It’s not a bug but an important limitation for data processing: non-unique IDs cause the data conflict that affects the further performance.

By the way, the corresponding warning is included in the debug version of the library

Thanks Listopad