diff --git a/src/components/book-out/BookOutForm.tsx b/src/components/book-out/BookOutForm.tsx
index 1f348b6..febdd98 100644
--- a/src/components/book-out/BookOutForm.tsx
+++ b/src/components/book-out/BookOutForm.tsx
@@ -168,10 +168,17 @@ export function BookOutForm({ setOpen, refreshData }: BookOutFormProps) {
 
   async function onSubmit(values: z.infer<typeof bookOutFormSchema>) {
     try {
+      // Find the selected customer by ID to get their name if needed, but we only need the ID for the relation
+      const selectedCustomer = customers.find(c => c.id === values.customer);
+      if (!selectedCustomer) {
+        showError("Invalid customer selected.");
+        return;
+      }
+
       // Prepare data for PocketBase
       const bookOutData = {
         bookOutDate: values.bookOutDate.toISOString(),
-        customer: values.customer, // Use the selected customer ID
+        customer: values.customer, // This should be the customer ID
         items: values.items.map(item => ({
           stockItemId: item.stockItemId,
           itemName: item.itemName,