After upgrading from 11.3 to 12.1, Xcode keeps popping up a warning screen saying "Multiple resources have same name: groupTableViewBackgroundColor" and said it maybe due to a SCM operation. The name/type of resource in the message can also be tableCellGroupedBackgroundColor.
I tried to manually edit main.storyboard to get rid of the duplicates but it keeps re-populating itself, even though I didn't initiate any source control operations.
Appreciate any input of how to stop this.