Hi There Just as an update to this thread I have resolved the issue. The new schema.xml had this entries
<!-- If you don't use child/nested documents, then you should remove the next two fields: --> <!-- for nested documents (minimal; points to root document) --> <field name="_root_" type="string" indexed="true" stored="false" docValues="false" /> <!-- for nested documents (relationship tracking) --> <field name="_nest_path_" type="_nest_path_" /><fieldType name="_nest_path_" class="solr.NestPathField" /> Once I commented out the lines containing _root_ and _nest_path_ (as we don't have nested documents) and re-started solr then no further duplication on update occurred. Regards Matthew Matthew Flowerday | Consultant | ULEAF Unisys | 01908 774830| matthew.flower...@unisys.com Address Enigma | Wavendon Business Park | Wavendon | Milton Keynes | MK17 8LX THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all devices. -----Original Message----- From: Flowerday, Matthew J <matthew.flower...@gb.unisys.com> Sent: 15 January 2021 11:18 To: solr-user@lucene.apache.org Subject: RE: Query over migrating a solr database from 7.7.1 to 8.7.0 EXTERNAL EMAIL - Be cautious of all links and attachments.
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