diff --git a/packages/language/src/validators/function-invocation-validator.ts b/packages/language/src/validators/function-invocation-validator.ts
index d3bb9e7c..a8666565 100644
--- a/packages/language/src/validators/function-invocation-validator.ts
+++ b/packages/language/src/validators/function-invocation-validator.ts
@@ -198,7 +198,7 @@ export default class FunctionInvocationValidator implements AstValidator<Express
         const versionArg = expr.args[0]?.value;
         if (versionArg) {
             const version = getLiteral<number>(versionArg);
-            if (version !== 4 && version !== 7) {
+            if (version !== undefined && version !== 4 && version !== 7) {
                 accept('error', 'first argument must be 4 or 7', {
                     node: expr.args[0]!,
                 });
@@ -212,7 +212,7 @@ export default class FunctionInvocationValidator implements AstValidator<Express
         const versionArg = expr.args[0]?.value;
         if (versionArg) {
             const version = getLiteral<number>(versionArg);
-            if (version !== 1 && version !== 2) {
+            if (version !== undefined && version !== 1 && version !== 2) {
                 accept('error', 'first argument must be 1 or 2', {
                     node: expr.args[0]!,
                 });
diff --git a/samples/sveltekit/src/routes/api/model/[...path]/+server.ts b/samples/sveltekit/src/routes/api/model/[...path]/+server.ts
index b3cb654c..1248aa03 100644
--- a/samples/sveltekit/src/routes/api/model/[...path]/+server.ts
+++ b/samples/sveltekit/src/routes/api/model/[...path]/+server.ts
@@ -5,6 +5,8 @@ import { schema } from "../../../../zenstack/schema";
 
 const handler = SvelteKitRouteHandler({
   apiHandler: new RPCApiHandler({ schema }),
+  // fully open ZenStackClient is used here for demo purposes only, in a real application,
+  // you should use one with access policies enabled
   getClient: () => db,
 });