我的Ubuntu版本是18.04 LTS RUN add-apt-repository 'deb https://cloud.r-project.org/bin/linux/ubuntu bionic-cran35W: GPG error: https://cloud.r-project.org/bin/linux/ubuntu bionic-cran35/ InRelease: The following signatureskey is
try // some business logiccatch(UniqueConstraintViolationException uex) when (!uex.IsFatal() && !ShouldRetry(descriptor, command, uex, ref retryResult)) throw new ItemAlreadyExistsException("Itemalready exists", uex);catch