This conversion to itself business isn't a viable solution. If the only thing that did was write metadata, then it would be OK, but you are actually converting, so the result files may be quite different-namely layout can be changed or broken altogether, pages, headers, footers added and removed, etc.
There are too many things to turn off or reset, if you can even get to them all, to try and ensure the only effect of the conversion is metadata writing.
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