diff --git a/backend/src/db/migrations/20251106172316_delete-pki-templates-on-project-removal.ts b/backend/src/db/migrations/20251106172316_delete-pki-templates-on-project-removal.ts
new file mode 100644
index 000000000..4d98f8af4
--- /dev/null
+++ b/backend/src/db/migrations/20251106172316_delete-pki-templates-on-project-removal.ts
@@ -0,0 +1,21 @@
+import { Knex } from "knex";
+
+import { TableName } from "../schemas";
+
+export async function up(knex: Knex): Promise<void> {
+  if (await knex.schema.hasTable(TableName.PkiCertificateTemplateV2)) {
+    await knex.schema.alterTable(TableName.PkiCertificateTemplateV2, (t) => {
+      t.dropForeign(["projectId"]);
+      t.foreign("projectId").references("id").inTable(TableName.Project).onDelete("CASCADE");
+    });
+  }
+}
+
+export async function down(knex: Knex): Promise<void> {
+  if (await knex.schema.hasTable(TableName.PkiCertificateTemplateV2)) {
+    await knex.schema.alterTable(TableName.PkiCertificateTemplateV2, (t) => {
+      t.dropForeign(["projectId"]);
+      t.foreign("projectId").references("id").inTable(TableName.Project);
+    });
+  }
+}