Is it possible to ^overcook^ a stew?

[fruittea]

I'm doing a main course for a dinner on Saturday, and have done a huge beef-in-guinness stew. It's had 3 hours in the oven already. On Saturday, as we're out elsewhere for the starter course, can I just bring it up to heat then put it in the oven for another 2 hours while we're out, or will that be too much?

The meat is reasonably tender, but not meltingly so.

Thanks

Beware running out of liquid and 'boiling' dry.
I guess the veg could just disintegrate if you over cook and it will turn into soup.

Shouldn't dry out, in fact a bit too liquidy at the mo, so that might help. Good point about the veg though!