Unable to update Customer Details (Edit Customer)

Path:
Agency Dashboard → Customers → Manage Customer → Manage → Edit Customer

Issue:
When editing a customer and updating only the customer name, clicking “Save Changes” triggers the following error message:

“The state.email has already been taken.”

Expected Behavior:
The customer details should update successfully when changing the name only, without triggering an email validation error if the email address has not been modified.

Actual Behavior:
Saving changes fails and displays an email duplication error even though the email was not changed. Changes cannot be made.