REMOVE OLD OWNER APPLE ID

No one has that information.

Apple values your privacy and has safeguards in place to ensure that no one can access the device.

You will need to reach out to the owner because it is the owner’s responsibility to properly erase the device before selling it.

Until then, it is locked. 🔐

As this is a used device you're trying to use, read this --> The All Too Common SAD Reality of Buying … - Apple Community

If whoever you got the phone from is unable to remove Activation Lock, your options are to get a refund or recycle the device.