Licensing Question

I currently have Solidworks 2017 and Solidworks 2015 with CFD running on my workstation. My predecessor opted not to upgrade the CFD when he upgraded to 2017 Solidworks.  I would like to move the 2015 with CFD to a new machine. Since both installs have the same serial number will I deactivate the 2017 when I deactivate the 2015 and CFD to move them to the new machine?

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