Add Field – Non-Unique email Field

I have created a registration form and Profile form for kids 18 & under. Their parents would fill out the form and enter the parent’s email address information. If the parent is already a member of our membership as an adult, the plugin will not allow them to enter their email address as a parent of the child. I would like the option to have a non-unique email field. The email address field already has the feature to check it the entered information is an email address. I would like the new email field to have the same validation, just not have to be unique.

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