upgrade SLES 12 SP5 to SLES 15 failed
The os is SLES 12 SP5,
uname -a :
Linux server30 4.12.14-122.66-default #1 SMP Mon Apr 12 10:54:37 UTC 2021 (8fc5925) x86_64 x86_64 x86_64 GNU/Linux.
I tried many online upgrades and messed up something. Then I finally try to use offline upgrade.
But, When boot from SLES 15 installation DVD to upgrading, it find the system is SLES 15 SP2.
How to clear the hidden SLES 15 SP2 settings ? So I can upgrade to SLES 15. Thanks.