"Source branch does not exist. Please restore it or use a different source branch" after merging a MR
Summary
Clicked on the "Merge" button on a MR, and got the following:
Steps to reproduce
I'm not sure if there was anything particular about that MR.
What is the current bug behavior?
The MR is not shown as merged and the error message appears.
What is the expected correct behavior?
The MR should be merged.
Relevant logs and/or screenshots
See above