Looker: some page view IDs are lost due to deduplication logic in web_page_context

[tomekzbrozek]

There's a deduplication logic in this line

snowplow-web-data-model/looker/web-block-v3/00_scratch_web_page_context.view.lkml

Line 35 in faa9f7a

SELECT * FROM prep WHERE root_id NOT IN (SELECT root_id FROM prep GROUP BY 1 HAVING COUNT(*) > 1) -- exclude all root ID with more than one page view ID

that makes root IDs associated to multiple rows filtered out from the events that are processed further. What's the rationale behind this? Shouldn't the model drop only duplicate values, but keep at least one event per root ID / page view ID?