Switch Application Configuration between Two Applications

We have project to do integration testing between mobile apps and AS400 (through Rumba). So we retrieved data from Mobile App and directly switch (call) the AS400 asset.

When we ran the AS400 asset, we encountered error Locator not Found. FYI, This AS400 asset is able to be executed before.

My suspect is the playback still recognize the mobile Application Configuration that should have recognize the AS400.

Could we like close the app config/switch it?