diff --git a/src/pages/api/exam/[module]/index.ts b/src/pages/api/exam/[module]/index.ts
index 563b953b..af9a7783 100644
--- a/src/pages/api/exam/[module]/index.ts
+++ b/src/pages/api/exam/[module]/index.ts
@@ -40,13 +40,13 @@ async function GET(req: NextApiRequest, res: NextApiResponse) {
 }
 
 async function POST(req: NextApiRequest, res: NextApiResponse) {
-	const user = await requestUser(req, res)
+	const user = await requestUser(req, res);
 	if (!user) return res.status(401).json({ ok: false });
 
 	const { module } = req.query as { module: string };
 
 	const session = client.startSession();
-	const entities = isAdmin(user) ? [] : mapBy(user.entities, 'id')
+	const entities = isAdmin(user) ? [] : mapBy(user.entities, "id");
 
 	try {
 		const exam = {
@@ -64,8 +64,16 @@ async function POST(req: NextApiRequest, res: NextApiResponse) {
 			// owners, throw exception if there is, else allow editing
 			const ownersSet = new Set(docSnap?.owners || []);
 
-			if (docSnap !== null && docSnap?.owners?.length === exam.owners.lenght && exam.owners.every((e: string) => ownersSet.has(e))) {
-				throw new Error("Name already exists");
+			if (docSnap !== null) {
+				if (docSnap.owners === undefined) {
+					docSnap.owners = [];
+				}
+				if (exam.owners === undefined) {
+					exam.owners = [];
+				}
+				if (docSnap.owners?.length !== exam.owners?.length || !exam.owners?.every((e: string) => ownersSet.has(e))) {
+					throw new Error("Name already exists");
+				}
 			}
 
 			await db.collection(module).updateOne(
@@ -73,13 +81,12 @@ async function POST(req: NextApiRequest, res: NextApiResponse) {
 				{ $set: { id: req.body.id, ...exam } },
 				{
 					upsert: true,
-					session
+					session,
 				}
 			);
 		});
 
 		res.status(200).json(exam);
-
 	} catch (error) {
 		console.error("Transaction failed: ", error);
 		res.status(500).json({ ok: false, error: (error as any).message });