Net Tie - Design Rule Error in Altium Designer
I solved this problem. This solution may be useful for those who will have the same problem in the future.

1. Firstly you have to be careful in the schematic section.

2. Open Schematic Library

3. Click to your component name(net tie) and you will see Library component properties. 

4. Change the  "Type" from "Standard" to "Net Tie" . 

5. Save

6. Update your footprints.

7. Use it, it will be done.

By the way , don't forget to review this pdf: -Net Ties and How to Use Them- https://www.smtnet.com/library/files/upload/NetTies-and-How-to-Use-Them.pdf