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[dspace_installation_dir]/config/spring/api/versioning-service.xml

In this file, you can determine specify which metadata fields are being reset automatically "reset" (i.e. cleared out) during the creation of a new item version.  By default, all metadata fields values (and bitstreams are replicated) are copied over to the newly created version, with the exception of dc.date.accessioned and dc.description.provenance.  You may specify additional metadata fields to reset by adding them to the "ignoredMetadataFields" property in the "versioning-service.xml" file:

<!-- Default Item Versioning Provider, defines behavior for replicating
     Item, Metadata, Budles and Bitstreams. Autowired at this time. -->
<bean class="org.dspace.versioning.DefaultItemVersionProvider">
    <property name="ignoredMetadataFields">
         <set>
            <value>dc.date.accessioned</value>
            <value>dc.description.provenance</value>
         </set>
    </property>
</bean>

Identifier Service Override

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