[galdosdi]

It depends on how much skin in the game you have as a reviewer. If you have to or will have to maintain the same codebase (sounds like in your case you do), then you have every moral right to reject the code and refuse to ship it. If you're literally not allowed to reject the code, escalate to your common manager. If it goes wrong later, at least you're on record objecting, and this could also be a signal to get a new job if your manager can't even handle this.

And if you don't have skin in the game (ie, process just requires "someone" to review it even if not on the same team), then whatever, give them the advice and let them burn themselves if they wish.