Modifying RAK7248 US915 to EU868

Hello community,
I have been delivered a wrong hotspot RAK7248 version, US915 instead of EU868. Is it possible to recover an EU868 version by changing the lorawan concentrator RAK2287? If it is possible, which version of the EU868 concentrator should I order : USB or SPI? What are the following steps in terms of software configuration change in order to onboard on the Helium network? Thanks for your help! Best regards