Replacing the bridge is a great idea. And if you aren’t sure about the history of the harness, don’t climb on it. You need to trust your bridge, your harness, your carabiner, your rope, your quickie, your tie in point, your tie in point, your tie in point. If you’re thinking you should back up your bridge by connecting to two bridges all the time, then maybe it just means you need to replace your bridge. It’s sort of like two wrongs don’t make a right, you know? Either the bridge is something you can use and trust or it isn’t. And that’s true for all your gear. This is just a fundamental aspect of the relationship you want to have with the tools you work with.