I have a magento with a default onepage checkout.
When a fresh registered, active customer tries to checkout I get the message "Prefix is a required field" no matter if the customer has already given his prefix or not.
As the prefix is mandatory for the project, setting it to "not required" is not an option.
How do I get magento to use the already given prefix and not throw this error?
See screenshot for the full situation. This happens no matter if the customer already has an address or not.