diff --git a/config/migrations/2024/20241007091759-insert-memberships-merged-municipalities.sparql b/config/migrations/2024/20241007091759-insert-memberships-merged-municipalities.sparql
new file mode 100644
index 0000000..9a10298
--- /dev/null
+++ b/config/migrations/2024/20241007091759-insert-memberships-merged-municipalities.sparql
@@ -0,0 +1,37 @@
+PREFIX org: <http://www.w3.org/ns/org#>
+PREFIX mu: <http://mu.semte.ch/vocabularies/core/>
+
+# Add the "has a relation with" membership between provinces and municipalities
+# for the new municipalities that were added for the 2025 mergers.
+
+INSERT {
+  GRAPH <http://mu.semte.ch/graphs/administrative-unit> {
+    ?membership a org:Membership ;
+      mu:uuid ?uuid ;
+      org:organization ?province ;
+      org:member ?municipality ;
+      org:role <http://data.lblod.info/id/rollen/4ec7d5c39bdc4e84b4174379b9e22ad8> . # has a relation with
+  }
+} WHERE {
+  GRAPH <http://mu.semte.ch/graphs/administrative-unit> {
+    ?province org:hasSubOrganization ?municipality .
+    FILTER (?province IN
+            (
+             <http://data.lblod.info/id/bestuurseenheden/298b13541e1e85de4b71535197aa1f3bbc4bdb67f0fe0f58ab4a7dc207af61fa> , # Oost-Vlaanderen
+             <http://data.lblod.info/id/bestuurseenheden/8b7e7bf05ace5bb1a68f5bc0d870e20c20f147b00bd9a3dcce3a01733d4da744> , # Vlaams-Brabant
+             <http://data.lblod.info/id/bestuurseenheden/14278813524c762255aeba149e7d7134ddecfbb43e7d56910731bd4e13e34f39> , # Limburg
+             <http://data.lblod.info/id/bestuurseenheden/bd74ee38a4b1e296821a11729c1f704cf439576c7ab2c910c95b067cf183d923> , # Antwerpen
+             <http://data.lblod.info/id/bestuurseenheden/8152e68420f560b8493d6c555a5bd4186903dc341028bb9855af6c44a9464fea> # West-Vlaanderen
+             )
+            )
+  }
+  BIND (SHA256(CONCAT(STR(?province), " has a relation with ", STR(?municipality))) AS ?uuid)
+  BIND (IRI(CONCAT("http://data.lblod.info/id/lidmaatschap/", ?uuid)) AS ?membership)
+
+  VALUES ?municipality {
+    <http://data.lblod.info/id/bestuurseenheden/19483103-318e-435a-aa37-45e485406ee9> # Beveren-Kruibeke-Zwijndrecht
+    <http://data.lblod.info/id/bestuurseenheden/b8bb293d-aa22-4b43-bda4-0b6af76e9493> # Merelbeke-Melle
+    <http://data.lblod.info/id/bestuurseenheden/1ca65d65-54ff-4b44-b750-bd70c91191af> # Nazareth-De Pinte
+    <http://data.lblod.info/id/bestuurseenheden/add1e4eb-9ec7-4ea6-af82-335aa76b7d48> # Pajottegem
+  }
+}
diff --git a/config/migrations/2024/20241007094811-insert-membership-new-district-borsbeek.sparql b/config/migrations/2024/20241007094811-insert-membership-new-district-borsbeek.sparql
new file mode 100644
index 0000000..29ebfb0
--- /dev/null
+++ b/config/migrations/2024/20241007094811-insert-membership-new-district-borsbeek.sparql
@@ -0,0 +1,22 @@
+PREFIX org: <http://www.w3.org/ns/org#>
+PREFIX mu: <http://mu.semte.ch/vocabularies/core/>
+
+INSERT {
+  GRAPH <http://mu.semte.ch/graphs/administrative-unit> {
+    ?membership a org:Membership ;
+    mu:uuid ?uuid ;
+    org:organization ?antwerp ;
+    org:member ?borsbeek ;
+    org:role <http://data.lblod.info/id/rollen/4ec7d5c39bdc4e84b4174379b9e22ad8> . # has a relation with
+  }
+} WHERE {
+  GRAPH <http://mu.semte.ch/graphs/administrative-unit> {
+    ?antwerp org:hasSubOrganization ?borsbeek .
+
+    FILTER (?antwerp = <http://data.lblod.info/id/bestuurseenheden/670db1d66c0de3b931962e1044033ccfa9d6e3023aa9828a5f252c3bc69bd32c>)
+    FILTER (?borsbeek = <http://data.lblod.info/id/bestuurseenheden/4b44e6f1-113b-4692-b149-44a889b215f2>)
+  }
+
+  BIND (SHA256(CONCAT(STR(?antwerp), " has a relation with ", STR(?borsbeek))) AS ?uuid)
+  BIND (IRI(CONCAT("http://data.lblod.info/id/lidmaatschap/", ?uuid)) AS ?membership)
+}
diff --git a/config/migrations/2024/20241007100727-insert-memberships-merged-ocmw.sparql b/config/migrations/2024/20241007100727-insert-memberships-merged-ocmw.sparql
new file mode 100644
index 0000000..951fecf
--- /dev/null
+++ b/config/migrations/2024/20241007100727-insert-memberships-merged-ocmw.sparql
@@ -0,0 +1,105 @@
+PREFIX org: <http://www.w3.org/ns/org#>
+PREFIX mu: <http://mu.semte.ch/vocabularies/core/>
+
+# Add the "has a relation with" membership between provinces and the new OCMWs
+# added for the 2025 mergers.
+INSERT {
+  GRAPH <http://mu.semte.ch/graphs/administrative-unit> {
+    ?membership a org:Membership ;
+    mu:uuid ?uuid ;
+    org:organization ?province ;
+    org:member ?ocmw ;
+    org:role <http://data.lblod.info/id/rollen/4ec7d5c39bdc4e84b4174379b9e22ad8> . # has a relation with
+  }
+} WHERE {
+  GRAPH <http://mu.semte.ch/graphs/administrative-unit> {
+    ?province org:hasSubOrganization ?ocmw .
+    FILTER (?province IN
+            (
+             <http://data.lblod.info/id/bestuurseenheden/298b13541e1e85de4b71535197aa1f3bbc4bdb67f0fe0f58ab4a7dc207af61fa> , # Oost-Vlaanderen
+             <http://data.lblod.info/id/bestuurseenheden/8b7e7bf05ace5bb1a68f5bc0d870e20c20f147b00bd9a3dcce3a01733d4da744> , # Vlaams-Brabant
+             <http://data.lblod.info/id/bestuurseenheden/14278813524c762255aeba149e7d7134ddecfbb43e7d56910731bd4e13e34f39> , # Limburg
+             <http://data.lblod.info/id/bestuurseenheden/bd74ee38a4b1e296821a11729c1f704cf439576c7ab2c910c95b067cf183d923> , # Antwerpen
+             <http://data.lblod.info/id/bestuurseenheden/8152e68420f560b8493d6c555a5bd4186903dc341028bb9855af6c44a9464fea> # West-Vlaanderen
+             )
+            )
+  }
+  BIND (SHA256(CONCAT(STR(?province), " has a relation with ", STR(?ocmw))) AS ?uuid)
+  BIND (IRI(CONCAT("http://data.lblod.info/id/lidmaatschap/", ?uuid)) AS ?membership)
+
+  VALUES ?ocmw {
+    <http://data.lblod.info/id/bestuurseenheden/fd41f573-7d9a-4d9f-b7d0-d5b6114d1622> # Beveren-Kruibeke-Zwijndrecht
+    <http://data.lblod.info/id/bestuurseenheden/5d94b2fd-60ee-4e56-a1f0-a586d596adf6> # Merelbeke-Melle
+    <http://data.lblod.info/id/bestuurseenheden/7d53f659-3a3b-44b1-9e77-3ea067678c0e> # Nazareth-De Pinte
+    <http://data.lblod.info/id/bestuurseenheden/650378e7-1bee-4737-91ff-5b20ac4623cf> # Pajottegem
+  }
+}
+;
+# Relate OCMWs with their municipalities
+## Beveren-Kruibeke-Zwijndrecht
+### Municipality: <http://data.lblod.info/id/bestuurseenheden/19483103-318e-435a-aa37-45e485406ee9>
+### OCMW: <http://data.lblod.info/id/bestuurseenheden/fd41f573-7d9a-4d9f-b7d0-d5b6114d1622>
+INSERT {
+  GRAPH <http://mu.semte.ch/graphs/administrative-unit> {
+    <http://data.lblod.info/id/bestuurseenheden/19483103-318e-435a-aa37-45e485406ee9> org:linkedTo <http://data.lblod.info/id/bestuurseenheden/fd41f573-7d9a-4d9f-b7d0-d5b6114d1622> .
+    ?membership a org:Membership ;
+    mu:uuid ?uuid ;
+    org:organization <http://data.lblod.info/id/bestuurseenheden/19483103-318e-435a-aa37-45e485406ee9> ;
+    org:member <http://data.lblod.info/id/bestuurseenheden/fd41f573-7d9a-4d9f-b7d0-d5b6114d1622> ;
+    org:role <http://data.lblod.info/id/rollen/4ec7d5c39bdc4e84b4174379b9e22ad8> . # has a relation with
+  }
+} WHERE {
+  BIND (SHA256(CONCAT(STR(<http://data.lblod.info/id/bestuurseenheden/19483103-318e-435a-aa37-45e485406ee9>), "has a relation with", STR(<http://data.lblod.info/id/bestuurseenheden/fd41f573-7d9a-4d9f-b7d0-d5b6114d1622>))) AS ?uuid)
+  BIND (IRI(CONCAT("http://data.lblod.info/id/lidmaatschap/", ?uuid)) AS ?membership)
+}
+;
+## Merelbeke-Melle
+### Municipality: <http://data.lblod.info/id/bestuurseenheden/b8bb293d-aa22-4b43-bda4-0b6af76e9493>
+### OCMW: <http://data.lblod.info/id/bestuurseenheden/5d94b2fd-60ee-4e56-a1f0-a586d596adf6>
+INSERT {
+  GRAPH <http://mu.semte.ch/graphs/administrative-unit> {
+    <http://data.lblod.info/id/bestuurseenheden/b8bb293d-aa22-4b43-bda4-0b6af76e9493> org:linkedTo <http://data.lblod.info/id/bestuurseenheden/5d94b2fd-60ee-4e56-a1f0-a586d596adf6> .
+    ?membership a org:Membership ;
+    mu:uuid ?uuid ;
+    org:organization <http://data.lblod.info/id/bestuurseenheden/b8bb293d-aa22-4b43-bda4-0b6af76e9493> ;
+    org:member <http://data.lblod.info/id/bestuurseenheden/5d94b2fd-60ee-4e56-a1f0-a586d596adf6> ;
+    org:role <http://data.lblod.info/id/rollen/4ec7d5c39bdc4e84b4174379b9e22ad8> . # has a relation with
+  }
+} WHERE {
+  BIND (SHA256(CONCAT(STR(<http://data.lblod.info/id/bestuurseenheden/b8bb293d-aa22-4b43-bda4-0b6af76e9493>), "has a relation with", STR(<http://data.lblod.info/id/bestuurseenheden/5d94b2fd-60ee-4e56-a1f0-a586d596adf6>))) AS ?uuid)
+  BIND (IRI(CONCAT("http://data.lblod.info/id/lidmaatschap/", ?uuid)) AS ?membership)
+}
+;
+## Nazareth-De Pinte
+### Municipality: <http://data.lblod.info/id/bestuurseenheden/1ca65d65-54ff-4b44-b750-bd70c91191af>
+### OCMW: <http://data.lblod.info/id/bestuurseenheden/7d53f659-3a3b-44b1-9e77-3ea067678c0e>
+INSERT {
+  GRAPH <http://mu.semte.ch/graphs/administrative-unit> {
+    <http://data.lblod.info/id/bestuurseenheden/1ca65d65-54ff-4b44-b750-bd70c91191af> org:linkedTo <http://data.lblod.info/id/bestuurseenheden/7d53f659-3a3b-44b1-9e77-3ea067678c0e> .
+    ?membership a org:Membership ;
+    mu:uuid ?uuid ;
+    org:organization <http://data.lblod.info/id/bestuurseenheden/1ca65d65-54ff-4b44-b750-bd70c91191af> ;
+    org:member <http://data.lblod.info/id/bestuurseenheden/7d53f659-3a3b-44b1-9e77-3ea067678c0e> ;
+    org:role <http://data.lblod.info/id/rollen/4ec7d5c39bdc4e84b4174379b9e22ad8> . # has a relation with
+  }
+} WHERE {
+  BIND (SHA256(CONCAT(STR(<http://data.lblod.info/id/bestuurseenheden/1ca65d65-54ff-4b44-b750-bd70c91191af>), "has a relation with", STR(<http://data.lblod.info/id/bestuurseenheden/7d53f659-3a3b-44b1-9e77-3ea067678c0e>))) AS ?uuid)
+  BIND (IRI(CONCAT("http://data.lblod.info/id/lidmaatschap/", ?uuid)) AS ?membership)
+}
+;
+## Pajottegem
+### Municipality: <http://data.lblod.info/id/bestuurseenheden/add1e4eb-9ec7-4ea6-af82-335aa76b7d48>
+### OCMW: <http://data.lblod.info/id/bestuurseenheden/650378e7-1bee-4737-91ff-5b20ac4623cf>
+INSERT {
+  GRAPH <http://mu.semte.ch/graphs/administrative-unit> {
+    <http://data.lblod.info/id/bestuurseenheden/add1e4eb-9ec7-4ea6-af82-335aa76b7d48> org:linkedTo <http://data.lblod.info/id/bestuurseenheden/650378e7-1bee-4737-91ff-5b20ac4623cf> .
+    ?membership a org:Membership ;
+    mu:uuid ?uuid ;
+    org:organization <http://data.lblod.info/id/bestuurseenheden/add1e4eb-9ec7-4ea6-af82-335aa76b7d48> ;
+    org:member <http://data.lblod.info/id/bestuurseenheden/650378e7-1bee-4737-91ff-5b20ac4623cf> ;
+    org:role <http://data.lblod.info/id/rollen/4ec7d5c39bdc4e84b4174379b9e22ad8> . # has a relation with
+  }
+} WHERE {
+  BIND (SHA256(CONCAT(STR(<http://data.lblod.info/id/bestuurseenheden/add1e4eb-9ec7-4ea6-af82-335aa76b7d48>), "has a relation with", STR(<http://data.lblod.info/id/bestuurseenheden/650378e7-1bee-4737-91ff-5b20ac4623cf>))) AS ?uuid)
+  BIND (IRI(CONCAT("http://data.lblod.info/id/lidmaatschap/", ?uuid)) AS ?membership)
+}