Why do I see the Zoho Desk integration status as Failed - The data is invalid due to validation restrictions?

Why do I see the Zoho Desk integration status as Failed - The data is invalid due to validation restrictions?

It is possible that certain field values in your form contain special characters. Zoho Desk does not allow special characters such as '&' due to which, the records didn't get through. 
To push the entries, navigate to the All Entries section of your form and click the edit icon corresponding to the entry to update the particular field's data. Then, you can re-push the failed entries to Zoho Desk.