@seanxair indeed, you may find you have, for example, the standard aircraft selected on a particular device. In my case I had been planning a route in SD with a different aircraft and had failed to put it back. This resulted in a warning that the SE2 was configured with the incorrect aircraft, when in fact it had been my failure to re select my own in SD. Of course my first call was to check the SE2 configuration for a while and do some head scratching until the penny dropped.
It would be less confusing if SD just advised an aircraft configuration conflict, rather than specifically saying the SE2 is incorrectly configured.