Why channel export fail with error 'UnicodeDecodeError caught in dump_rpms' on Satellite 5.6?

Issue

• Why getting the following error when trying to backup satellite settings?

[root@ ~]# rhn-satellite-exporter -c rhel-x86_64-server-6 --dir /home/user/satellite-backup/
22:39:20 Gathering channel info...
Appending channels []
22:39:20 Gathering binary RPM info...
22:39:20 Gathering package info...
22:39:20 Gathering errata info...
22:39:20 Gathering kickstart data...
22:39:20 Gathering kickstart files info...
22:39:20 Exporting channel families...
         ____________________
Exporting: #################### - Done!
22:39:20 Exporting arches...
           ____________________
Exporting: #################### - Done!
22:39:21 Exporting arches extra...
           ____________________
Exporting: #################### - Done!
22:39:21 Exporting channel info...
           ____________________
Exporting: #################### - Done!
22:39:21 Exporting blacklists...
           ____________________
Exporting: #################### - Done!
22:39:21 Exporting short packages...
           ____________________
Exporting: #################### - Done!
22:40:17 Exporting binary RPMs...
           ____________________
Exporting: ######22:43:24
UnicodeDecodeError caught in dump_rpms.