diff --git a/config/migrations/2023/20231221132600-fix-duplicate-lang-strings.sparql b/config/migrations/2023/20231221132600-fix-duplicate-lang-strings.sparql
new file mode 100644
index 0000000..95088fa
--- /dev/null
+++ b/config/migrations/2023/20231221132600-fix-duplicate-lang-strings.sparql
@@ -0,0 +1,16 @@
+DELETE
+{
+  GRAPH ?g {
+    ?s ?p ?oLang.
+  }
+}
+WHERE {
+  GRAPH ?g {
+    ?s ?p ?oLang.
+    ?s ?p ?o .
+  }
+
+  BIND(LANG(?oLang) as ?lang)
+  FILTER(STRLEN(STR(?lang)) > 0)
+  FILTER(STR(?oLang) = ?o)
+}
\ No newline at end of file