JCAPS is notoriously cryptic. In this instance, it is trying to tell you that you've changed your JCD, but not hit the green commit button in the JCD editor (bottom left). To fix this, open the JCD, hit the commit button, hit the validate button (top middle) then save it. For good measure, I would also commit the JCD file itself.
As an aside, if you can avoid using JCAPS altogether, I'd suggest Mirth for light weight integration projects and camel for everything else.