"pre-release note" to be sent out to the remote installations.

This (and the proper release note) SUPERCEDES what was in PR #6522!
i.e. we are sending out only ONE note, not TWO, there's only one
script to run, etc.
(ref. #6510)

doc/release-notes/6510-duplicate-datafiles-and-datatables.md

@@ -0,0 +1,24 @@
+We recently discovered that *potential* data integrity issues in
+Dataverse databases.  One manifests itself as duplicate DataFile
+objects created for the same uploaded file; the other as duplicate
+DataTable (tabular metadata) objects linked to the same
+DataFile. (GitHub issues https://github.com/IQSS/dataverse/issues/6522
+and https://github.com/IQSS/dataverse/issues/6510 respectively).
+
+Please run the diagnostic script provided at
+https://github.com/IQSS/dataverse/raw/6510-repeated-ingests/scripts/issues/6510/check_datafiles_6522_6510.sh
+[NOTE!! the branch name must be changed to "develop" in the URL above before we merge!!]
+
+The script relies on the PostgreSQL utility psql to access the
+database. You will need to edit the credentials at the top of the script
+to match your database configuration.
+
+If neither of the two issues is present in your database, you will see
+a message "... no duplicate DataFile objects in your database" and "no
+tabular files affected by this issue in your database".
+
+If either, or both kinds of duplicates are detected, the script will
+provide further instructions. We will need you to send us the produced
+output. We will then assist you in resolving the issues in your
+database.
+

scripts/issues/6510/PRE-RELEASE-INFO.txt

@@ -0,0 +1,24 @@
+We recently discovered that *potential* data integrity issues in
+Dataverse databases.  One manifests itself as duplicate DataFile
+objects created for the same uploaded file; the other as duplicate
+DataTable (tabular metadata) objects linked to the same
+DataFile. (GitHub issues https://github.com/IQSS/dataverse/issues/6522
+and https://github.com/IQSS/dataverse/issues/6510 respectively).
+
+Please run the diagnostic script provided at
+https://github.com/IQSS/dataverse/raw/6510-repeated-ingests/scripts/issues/6510/check_datafiles_6522_6510.sh
+[NOTE!! the branch name must be changed to "develop" in the URL above before we merge!!]
+
+The script relies on the PostgreSQL utility psql to access the
+database. You will need to edit the credentials at the top of the script
+to match your database configuration.
+
+If neither of the two issues is present in your database, you will see
+a message "... no duplicate DataFile objects in your database" and "no
+tabular files affected by this issue in your database".
+
+If either, or both kinds of duplicates are detected, the script will
+provide further instructions. We will need you to send us the produced
+output. We will then assist you in resolving the issues in your
+database.
+