title: GitHub/Git: Can't create pull request (no button) with specific branch
body: <p>I have 3 branch: <code>main</code>, <code>test-1.1</code> and <code>myName</code>.<br />
  If I try to create pull request with <code>myName</code> and <code>main</code>, I will be able to do it:<br />
  <a href="https://i.stack.imgur.com/bBxZh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bBxZh.png" alt="enter image description here" /></a></p>
  <p>But know, if I replace <code>main</code> with my <code>test-1.1</code> branch, it gives me that:<br />
  <a href="https://i.stack.imgur.com/klohq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/klohq.png" alt="enter image description here" /></a>
  But, why ? I want to merge with <code>test-1.1</code> but I am not able to.<br />
  How to resolve this ?</p>