This error was encountered while trying to build one of our apps that had signing via fastlane match set up.
After some googling I found these steps. The long and the short of it is that if you generate a signing certificate via fastlane cert and/or Xcode automatic signing it will conflict with the cert needed by fastlane match. To resolve this you should backup and delete your distribution certs and then rely on fastlane match to generate them for you.