FAA license based on my JAR license
I recently obtained an FAA license, based on my JAR (UK-issued) license. The license has words to the effect of: "This license is only valid when accompanied by UK license number UK/PP/xxxxx"
I've now upgraded my JAR PPL to a CPL. The license number has therefore changed. It is no longer UK/PP/xxxxx it's now UK/CP/xxxxx.
Does this mean my FAA license is no longer valid? Can I have the number of my foreign license amended? Will this require a letter of authenticity from the CAA? Will I loose any additional ratings which I've added to my FAA license?
FFF
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PS - Not quite sure which forum is best for this. It's almost Private Flying, but since it relates specifically to a Commercial license, that didn't seem quite right, although it's not a Wannabes question, so I thought Questions was best. Mods - feel free to move it if you think it's appropriate!