None of them.
All the field change history is preserved, but it's nothing to do with "column type".
Could you explain what you're looking for in more detail please?
I have a request to provide a new column that displays current value, while keeping historical values available.
Example: Column called "Historical Info". Users want to be able to change the value as necessary, but be able to reference past values of the column.
Sorry, "column"? Do you mean field, or a column in the navigator, or boards, or...?
Sorry, I mean field.
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