Your JAR-FCL license was converted into a Part-FCL license (EASA) ?
Your FAA Pilot Certificate is based on the previous license number (JAR-FCL) which you converted into a Part-FCL license (EASA).
There is a simplified process available to have your FAA Pilot Certificate updated and reissued with your new License number.
You will need to know you height in inches and your weight in pounds.
If you are not familiar with these units, this converter from cm/kg will help you: