Updating from a purchased MacBook and the old user's Apple ID is blocking me from updating

Hello,

I recently purchased an older MacBook Pro (mid-'12) to utilize for my small business -- a stand alone machine. It was such a great deal I couldn't pass it up and LOVE Apple products.

Now, I'm updating since this machine sat around for many, many years without being updated. The old user's Apple ID pops up and I can't entire in my Apple ID to retrieve updates? Help !!!

Thank you and Best Regards,

Chris