A private sys_property is skipped during upgrades and is reported to the end user as a skip error.
Steps to Reproduce
Go to /sys_properties_list.do.
Mark a sys_property as is_private=true and modify it.
Upgrade the instance.
Review the upgrade log.
Instead of the private sys_property being silently skipped, a skip error is generated, potentially causing confusion.
The property is correctly skipped because it is private but is incorrectly marked as a skipped_error. This skip error can be ignored.
Related Problem: PRB683186