I had this problem with updating exim:
exim-4.93-2.1.x86_64.rpm install failed rpm output: error: unpacking of archive failed on file /usr/share/doc/packages/exim/doc/cve-2019-13917: cpio: File from package already exists as a directory in system error: exim-4.93-2.1.x86_64: install failed error: exim-4.92.2-1.1.x86_64: erase skipped
Workaround: run before updating rm -r /usr/share/doc/packages/exim/doc/cve-2019-13917