Blocking to Connect Any Contact's Deal to Other Contact Quote

Blocking to Connect Any Contact's Deal to Other Contact Quote

Hello,

The system allows to assign any deal which belongs to different contact person deal on quote creation page.

For example, I can assign X contact's deal into Y contact's quote. I don't know mention of this process but it's not suitable for our business and sometimes, we're getting mess situation because of that.

I would like to create a structure the user is only able to assign deal to quote which is belongs to related contact person.

How is it possible? 

Could could you please help me? 

Thank you.