Dell Cyber Recovery CyberSense SUSE OS Upgrade From 12 SP5 to 15 SP4 Failed

zypper up command was not updating packages:

Note: System reboot required.

Backend: classic_rpmtrans
Continue? [y/n/v/...? shows all options] (y): y
Retrieving: libruby2_1-2_1-2.1.9-18.1.x86_64 (SLES12-SP5-Pool)
Failed to provide package libruby2_1-2_1-2.1.9-18.1.x86_64 (SLES12-SP5-Pool). Do you want to retry retrieval?

[SUSE_Linux_Enterprise_Server_x86_64:SLES12-SP5-Pool|plugin:/susecloud?credentials=SUSE_Linux_Enterprise_Server_x86_64&path=/repo/SUSE/Products/SLE-SERVER/12-SP5/x86_64/product/] Can l
x86_64.rpm' from repository 'SUSE_Linux_Enterprise_Server_x86_64:SLES12-SP5-Pool'
History:
 - Unsupported URI scheme in 'plugin:/susecloud?credentials=SUSE_Linux_Enterprise_Server_x86_64&path=/repo/SUSE/Products/SLE-SERVER/12-SP5/x86_64/product/'.
 - Can't provide ./x86_64/libruby2_1-2_1-2.1.9-18.1.x86_64.rpm

After zypper up command failed, Cyber Recovery upgrade from 8.12 version to 8.15 failed as no available repositories.

Remove repositories with the below commands:

Zypper mr. -d SLES12

Zypper mr -d SLES-SP5-pool

Zypper mr -d SLE-SDK12-SP5pUpdates

Ater removing the repositories, the CyberSense upgrade completed successfully

See the below outputs:

cybersense:~ # zypper mr -d SLES12-SP5-Pool
Repository 'SUSE_Linux_Enterprise_Server_x86_64:SLES12-SP5-Pool' has been successfully disabled.
cybersense:~ # zypper mr -d SLE-SDK12-SP5-Updates
Repository 'SUSE_Linux_Enterprise_Software_Development_Kit_x86_64:SLE-SDK12-SP5-Updates' has been successfully disabled.
cybersense:~ #