How do you handle continuing games you considered completed?

I've been stuck on this dilemma for a while now, so I thought I might as well ask here. How do you handle continuing games that you considered completed? Let me specify what exactly I mean by this. I'm talking about games where you at first only did a main or main+ playthrough and you felt that was enough at the time, but then you later came back to complete more of the game. Just to clarify I'm not talking about coming back to an unfinished game you played once it was finished, since that completion wasn't meant to be permanent anyway. Because you were planning to return to the game eventually. The playthrough isn't a replay since its still technically just continuing the same playthrough just with a gap in between both parts of the playthrough.

The problem I'm facing is that if I take the game out of the completed section and put it back into playing, it feels like nullifying the original completion. I like looking at my completion list and seeing what games I finished at specific times and in what order. Taking a game out and putting it in a different position feels like it's erasing that history, but neither does calling it a replay or an entirely separate playthrough, since it is the same playthrough as before. So what's your take on this?

In cases where I have finished a game in some form but are continuing, or plan to go back and do more, I tag as completed and then playing/backlog as an additional field.

The status of game is a checkbox rather than a radio button, so you can have as many statuses/lists as you want applied to a single play through.

In cases where I have finished a game in some form but are continuing, or plan to go back and do more, I tag as completed and then playing/backlog as an additional field.

The status of game is a checkbox rather than a radio button, so you can have as many statuses/lists as you want applied to a single play through.

But once you finish the continued playthrough, you'll put in the new completion times, essentially erasing the original completion. So the result is the same.

I leave it on completed