How are master strings set up in the master branch?

Yes, we do upload sources after merging translations into gitlab. But in this case these translations remained duplicate and only in the “my-test-branch” branch
We use the “Show within a version branch (strict detection)” strategy.

Do I understand correctly that in this case, when we fix only translations (not sources), we have to manually remove the “master string” so that the duplicate from the branch where the translation was fixed becomes the master string?