## Description
Sometimes, we need to use an upstream mirror repository to update the
current development repository, but mirror repositories are prohibited
from PR. It should not appear in `merge to,` but it can appear in `pull
from.`
Fix#24585#26193#26781
Related #24183
Many thanks to @apnote for assisting me in reproducing this bug!
## ScreenShot
---
### Before
<img
src="3d76c376-1f54-45b9-80c9-6ba8319d6a9a"
width="400px">
<img
src="fbfd9f7f-421f-4a2e-9a3e-f2958bbf3312"
width="400px">
### After
<img
src="e6984524-4f61-4310-b795-4d8598bd8963"
width="400px">
<img
src="04065b44-78d7-4721-bf31-0f1674150727"
width="400px">