tweak release note, mention backward incompatibility, reexport #8129

doc/release-notes/8129-harvesting.md

@@ -3,8 +3,16 @@
 The `oai_dc` export and harvesting format has had the following fields remapped:
 
 - dc:type was mapped to the field "Kind of Data". Now it is hard-coded to the word "Dataset".
-- dc:date was mapped to the field "Production Date" when available and otherwise to "Publication Date". Now it is mapped the field “Publication Date” or the field used for the citation date, if set (see [Set Citation Date Field Type for a Dataset](https://guides.dataverse.org/en/6.3/api/native-api.html#set-citation-date-field-type-for-a-dataset)).
+- dc:date was mapped to the field "Production Date" when available and otherwise to "Publication Date". Now it is mapped the field "Publication Date" or the field used for the citation date, if set (see [Set Citation Date Field Type for a Dataset](https://guides.dataverse.org/en/6.3/api/native-api.html#set-citation-date-field-type-for-a-dataset)).
 
-As these are backward incompatible changes, they have been noted in the [API changelog](https://guides.dataverse.org/en/latest/api/changelog.html).
+In order for these changes to be reflected in existing datasets, a [reexport all](https://guides.dataverse.org/en/6.3/admin/metadataexport.html#batch-exports-through-the-api) should be run.
 
-For more information, please see issue #8129.
+For more information, please see #8129 and #10737.
+
+### Backward incompatible changes 
+
+See the "Remap oai_dc export" section above.
+
+### Upgrade instructions
+
+In order for changes to the `oai_dc` metadata export format to be reflected in existing datasets, a [reexport all](https://guides.dataverse.org/en/6.3/admin/metadataexport.html#batch-exports-through-the-api) should be run.