Some tools such at replication need the ability to change various subversion properties. By default subversion does not allow this because it is not a tracked change. You may be told that the “pre-reveprop-change” hook needs to be created or something similar.
To allow this choose Property changes from the Action menu of the repository.
No property changes is the default.
Log properties only permits the log property (commit message) to be changed, but no others.
All properties of course allows any property to be changed.