Depends what version of Photoshop. If CC just go ahead and do it. If a permanent license version (CS6 and earlier) you need to deactivate the previous version.
correct, I did it and work well
2015-02-09 20:01 GMT-03:00 Trevor.Dennis <email@example.com>:
Changing computer created by Trevor.Dennis
<https://forums.adobe.com/people/Trevor.Dennis> in *Photoshop General
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