it this is about node-locked license files, the license is registered at Cisco by UDI (DEVtype+SN), with this info a license file is generated.
Prime alone cannot do this!
Prime will not contact Cisco to generate a new license file for another UDI.
But Prime can distribute licenses
Administration / Licenses and Software Updates / Licenses -> files -> license files -> add
may make your license file available here for a device that requests it.
I myself never used this for router licenses, but you can check if this works