Unable to promote work item

**Describe the bug**
I have a work item which is approved and in github it shows no conflict. When i select this work item to promote it says "**Work Items must be from the same stage to be promoted together"**. However, I don't see any other work item selected in any of the stage.
But what i observe is that work item in next stage has some common components also which i am now trying to promote.

**To Reproduce**
Steps to reproduce the behavior:
1. Created a work item
2. Added the changes
3. approved the PR / Externally merged it
4. select it for promotion
...

**Expected behavior**
Work item should be allowed to promoted.

**Screenshots**

**Additional context**
Add any other context about the problem here.