Version 1.3.0-3 of ccdproc is marked for autoremoval from testing on Wed 21 Nov 2018. It depends (transitively) on scikit-learn, affected by #907806. You should try to prevent the removal by fixing these RC bugs.
Last update: 2018-11-18
Standards version of the package is outdated.
The package should be updated to follow the last version of Debian Policy
(Standards-Version 4.2.1 instead of