I want to generate multisignature address with person, which I didn't know.

Someone send me a public key. Then I do:

bitcoin-cli getnewaddress "" legacy

Ok, I got

1QKVwuQnu69HgsMVvynFhApYmmdLf8bMKT

After that, I need to know my own public key:

bitcoin-cli validateaddress "1QKVwuQnu69HgsMVvynFhApYmmdLf8bMKT"

But v.017 do not give me a public key:

{
"isvalid": true,
"address": "1QKVwuQnu69HgsMVvynFhApYmmdLf8bMKT",
  "scriptPubKey": "76a914ffca8b339408c5eb664513f62c98256c5edcc98b88ac",
  "isscript": false,
  "iswitness": false
} 

Is there any way to generate multisignature address (2 of 2) if wallet do not know one of this addressess ?