Out of the box PA-500 steps taken,
1. down graded version to 4.1.10 successfully.
2. under device -> setup -> management, i changed the management interface IP, and on commit I get the following error.
invalid configuration. Schema verification failed.
profiles -> decryption unexpected here
Did some searching on support but could not find something that relates to the above error.
Sounds you were previously using 5.0 or above.
If correct, PA supports SSL Decryption profile from 5.0 as new feature.
In the process of downgrade PANOS, PA does not automatically convert configuration file for 4.1, so you need to delete new schema manually.
To delete them, you first need to export current config, delete it, then import and load new one.
I think you can find following part in your config file (xml file)
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