Pre-installed win 11 pro not activated in recently bought mini pc. gives error 0x004F215

[TMMR]

Activation state says not active with an error readingWindows reported that there was a problem with your OEM product key. Error code:0xC004215clicking the troubleshoot button gives popup:Troubleshooting has completedWe weren't able to activate Windows on this deviceusing slmgr /dligives output:Name: Windows(R), Professional editionDescription: Windows(R) Operating System, RETAIL channelLicense Status: NotificationNotification Reason: 0xC004F034.

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