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NOTE_NLP CDM Versioning or Duplicate CDM Concepts

Folks,

We have been working on referencing the NOTE_NLP and its columns, but it appears there are multiple concepts which are identical but only differ in VALID_START_DATE and CDM Concept Code. Is this an intentional versioning issue or are these duplicates?

Any information appreciated.

https://athena.ohdsi.org/search-terms/terms?query=note_nlp.note_id&boosts&page=1

Hello, @JohnOsborne. There are concepts seem to be identical but they can regard to slightly different situations

Here you go:

t