what is the function of "Partial allow import correction only" under the manage sources setup

Summary:

What does Freeze Journal setting of "Partial allow import correction only" do in revaluation setting? Can it be delete/reverse or modify after set the "partial allow import correction only" for revaluation sources?

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):