Cannot add node 'Retriever2' You have already added the same instance to the pipeline under the name 'Retriever'.

[Koenlaermans]

You can not add the same component twice under a different name. Not sure why this limitation exists.
Let's say I want to
-retrieve top 10 documents,
-split the top 10 into smaller documents and then
-add the retriever again to get the top 10 smaller documents

This now requires me to make a new retriever instance

[julian-risch]

Hi @Koenlaermans This is a known issue for the current pipeline implementation and we're working on a major re-implementation of pipelines tracked by the epic #4390
I will close this issue here as it's tracked by #4390 Until that one is solved the workaround is as you described. One reason for the current limitation is about preventing loops.