I guess I’m not understanding what you’re trying to do. When it’s time to redigitize, why would you want to upres the ENTIRE clip? Wouldn’t you only need the 3 seconds used in the timeline and not the 20 minutes from the original clip? My point is, that these new “ins and outs” from the “used” portion of the clip should be nowhere near the last frame of the original clip. Therefore, the error you’re reporting would not be an issue.
If for some reason you just want to redig everything, then you may run into the problem.
Mark