If instances of a class exist, the following actions can be performed, but there may be a loss of data when reorganization takes place.
Recovery does not work across reorganizations.
When recovery is an issue, ensure that you perform a backup of the database before the reorganization is performed.
Reorganization of primitive collections is not supported.
A warning message is displayed when a collection membership of primitive types is changed from one primitive type to another and the class is already marked for reorganization or the change will cause the class to be marked for reorganization, as the changing of collection membership of primitive types is not supported by the reorganization process.