2719721 - Unique email address for External Users registered via Learning Sites

When external users register through Sites and they add an email address that is already linked to another user, a warning message appears:

However, in System Admin>Configuration>System Configuration>LMS_ADMIN the value 'selfRegistrationUniqueEmailAddressRequired' is set to 'True'

This setting should prevent the user from registering and provide a validation error as follows:

SAP SuccessFactors Learning

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