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ICD-0 Versions

So ICD-O 3.2 came out 1-Jan-2021.Perhaps this has been discussed before. The way ICD-O works is that the preferred terms updates in a given version are for diseases diagnosed after the update comes out. There are significant changes to 3.2. Has any thought been given to tracking what version of ICD-O a term comes from?

So for example under 3.1 the the description is Urothelial papilloma, inverted. Under 3.2 the description is Sinonasal papilloma, exophytic. The description depends on when the diagnosis occurred.

Also why are some ICD-O3 concepts standard and others non-standard even thought are both current ICD-O3 codes?

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