Some rpm files were missing.
Most likely, you want to create these signed copies.

Missing files:
/mnt/koji/packages/drbd/9.33.0/1.el7_9/data/signed/3fd3ac9e/noarch/drbd-bash-completion-9.33.0-1.el7_9.noarch.rpm
/mnt/koji/packages/drbd/9.33.0/1.el7_9/data/signed/3fd3ac9e/noarch/drbd-pacemaker-9.33.0-1.el7_9.noarch.rpm
/mnt/koji/packages/drbd/9.33.0/1.el7_9/data/signed/3fd3ac9e/noarch/drbd-udev-9.33.0-1.el7_9.noarch.rpm
/mnt/koji/packages/drbd/9.33.0/1.el7_9/data/signed/3fd3ac9e/x86_64/drbd-9.33.0-1.el7_9.x86_64.rpm
/mnt/koji/packages/drbd/9.33.0/1.el7_9/data/signed/3fd3ac9e/x86_64/drbd-debuginfo-9.33.0-1.el7_9.x86_64.rpm
/mnt/koji/packages/drbd/9.33.0/1.el7_9/data/signed/3fd3ac9e/x86_64/drbd-utils-9.33.0-1.el7_9.x86_64.rpm