Any tips on replacing historical entries across days?

I just started using cronometer and love it so far. For the past several weeks I have logged Kerrygold butter (brand name) in my diary. I recently read the article about using the NCCDB database items and found the generic "butter, salted" entry has 77 nutrients instead of the 6 the brand name entry recorded.

Is there a good way to find historical entries and replace them with a different item or do I have to sit down, muster some patience, and slog through it?

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