Why does package install/update from a custom channel fail with error "Public key for package is not installed"?

Solution Verified - Updated -

Issue

  • Why does package install/update from a custom channel fail with error "Public key for package is not installed"?

    $ yum install mysql
...
Downloading Packages:
warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID 37017186
Public key for mysql-5.0.77-3.el5.i386.rpm is not installed

Environment

  • Red Hat Network (RHN) Satellite
  • Red Hat Enterprise Linux system subscribed to cloned/custom channel

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