diff --git a/CHANGELOG.md b/CHANGELOG.md
index 09f08b0..19398b2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 ## Unreleased
+### Backend
+- datafix: move memberships involving provinces and municipalities to shared graph [OP-3619]
+### Deploy notes
+```
+drc restart migrations; drc logs -ft --tail=200 migrations
+```
 
 ## v1.32.1 (2025-06-02)
 ### Backend
diff --git a/config/migrations/2025/20250603161306-fix--move-memberships-for-municipalities-and-provinces-to-shared/20250603161306-fix--move-memberships-for-municipalities-and-provinces-to-shared.sparql b/config/migrations/2025/20250603161306-fix--move-memberships-for-municipalities-and-provinces-to-shared/20250603161306-fix--move-memberships-for-municipalities-and-provinces-to-shared.sparql
new file mode 100644
index 0000000..bb3b48e
--- /dev/null
+++ b/config/migrations/2025/20250603161306-fix--move-memberships-for-municipalities-and-provinces-to-shared/20250603161306-fix--move-memberships-for-municipalities-and-provinces-to-shared.sparql
@@ -0,0 +1,24 @@
+PREFIX org: <http://www.w3.org/ns/org#>
+
+DELETE {
+  GRAPH <http://mu.semte.ch/graphs/administrative-unit> {
+    ?membership ?p ?o .
+    ?organization org:hasSubOrganization ?member .
+  }
+} INSERT {
+  GRAPH <http://mu.semte.ch/graphs/shared>{
+    ?membership ?p ?o .
+    ?organization org:hasSubOrganization ?member .
+  }
+} WHERE {
+  GRAPH <http://mu.semte.ch/graphs/administrative-unit> {
+    ?membership a org:Membership ;
+                org:member ?member ;
+                org:organization ?organization ;
+                ?p ?o .
+  }
+  GRAPH <http://mu.semte.ch/graphs/shared> {
+    ?member org:classification <http://data.vlaanderen.be/id/concept/BestuurseenheidClassificatieCode/5ab0e9b8a3b2ca7c5e000001> . # Municipality
+    ?organization org:classification <http://data.vlaanderen.be/id/concept/BestuurseenheidClassificatieCode/5ab0e9b8a3b2ca7c5e000000> . # Province
+  }
+}