Fix pqr update

src/libs/routes/simulation.js

@@ -58,7 +58,7 @@ simulationApp.put('/pqr', passport.authenticate('bearer', { session: false }), (
             res.statusCode = 401;
             return next({err: { msg: 'Unauthorized'}});
         }
-        pqr.content = req.body.content | pqr.content;
+        pqr.content = req.body.content || pqr.content;
         pqr.save((err) => {
             if(err) {
                 log.error(err);