CLSRSC-00768
Pre-upgrade check failed because ASM diskgroup string does not have compatibility.rdbms to be at least 19.0.0.0.0
Cause
The ASM diskgroup does not have compatibility.rdbms to be at least 19.0.0.0.0.
Action
Ensure that all the ASM diskgroups have compatibility.rdbms to be at least 19.0.0.0.0 for upgrade.