[R-sig-Debian] Bionic beaver repository issues

[Cyclic Group Z_1]

Hello,
I appear to have a similar issue as Willem Ligtenberg (Disco Dingo repository issues, Thu May 2 19:01:04 CEST 2019), except on a completely fresh installation of Ubuntu 18.04 LTS (Bionic Beaver). After updating and upgrading packages and adding the repo "deb https://cloud.r-project.org/bin/linux/ubuntu bionic-cran35/" and associated key, attempting to install r-base fails due to unmet dependencies:
    sudo apt install r-base    Reading package lists... Done    Building dependency tree    Reading state information... Done    Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming.    The following information may help to resolve the situation:        The following packages have unmet dependencies:     r-base : Depends: r-base-core (>= 3.6.0-2bionic) but 3.4.4-1ubuntu1 is to be installed              Depends: r-recommended (= 3.6.0-2bionic) but it is not going to be installed              Recommends: r-base-html but it is not going to be installed
Dr. Rutter resolved the issue on Disco Dingo by fixing an entry in a configuration file. Was there perhaps a similar issue in a configuration file in the Bionic Beaver version that may not have been resolved?
Best,B
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