diff --git a/openbas-api/src/main/java/io/openbas/migration/V3_41__Update_constraint_on_delete_cascade.java b/openbas-api/src/main/java/io/openbas/migration/V3_41__Update_constraint_on_delete_cascade.java
new file mode 100644
index 0000000000..fefeacd197
--- /dev/null
+++ b/openbas-api/src/main/java/io/openbas/migration/V3_41__Update_constraint_on_delete_cascade.java
@@ -0,0 +1,27 @@
+package io.openbas.migration;
+
+import org.flywaydb.core.api.migration.BaseJavaMigration;
+import org.flywaydb.core.api.migration.Context;
+import org.springframework.stereotype.Component;
+
+import java.sql.Connection;
+import java.sql.Statement;
+
+@Component
+public class V3_41__Update_constraint_on_delete_cascade extends BaseJavaMigration {
+    @Override
+    public void migrate(Context context) throws Exception {
+        Connection connection = context.getConnection();
+        Statement select = connection.createStatement();
+        select.execute("ALTER TABLE inject_importers DROP CONSTRAINT inject_importers_injector_contract_id_fkey;");
+        select.execute("ALTER TABLE rule_attributes DROP CONSTRAINT rule_attributes_importer_id_fkey;");
+
+        // Add the new foreign key constraint with ON DELETE CASCADE
+        select.execute("ALTER TABLE inject_importers ADD CONSTRAINT inject_importers_injector_contract_id_fkey FOREIGN KEY (importer_injector_contract_id) REFERENCES injectors_contracts(injector_contract_id) ON DELETE CASCADE;");
+        select.execute("ALTER TABLE rule_attributes ADD CONSTRAINT rule_attributes_importer_id_fkey FOREIGN KEY (attribute_inject_importer_id) REFERENCES inject_importers(importer_id) ON DELETE CASCADE;");
+
+        // Optionally, you can reindex if necessary (usually not required just for FK changes)
+        select.execute("CREATE INDEX IF NOT EXISTS idx_inject_importers_injector_contracts ON inject_importers(importer_injector_contract_id);");
+        select.execute("CREATE INDEX IF NOT EXISTS idx_rule_attributes_inject_importers ON rule_attributes(attribute_inject_importer_id);");
+    }
+}
diff --git a/openbas-model/src/main/java/io/openbas/database/model/InjectImporter.java b/openbas-model/src/main/java/io/openbas/database/model/InjectImporter.java
index 1f9d3b2e02..6d7f59eca9 100644
--- a/openbas-model/src/main/java/io/openbas/database/model/InjectImporter.java
+++ b/openbas-model/src/main/java/io/openbas/database/model/InjectImporter.java
@@ -37,7 +37,7 @@ public class InjectImporter implements Base {
     @NotBlank
     private String importTypeValue;
 
-    @OneToOne
+    @OneToOne(cascade = CascadeType.ALL, orphanRemoval = true)
     @JoinColumn(name = "importer_injector_contract_id")
     @JsonProperty("inject_importer_injector_contract")
     @JsonSerialize(using = MonoIdDeserializer.class)