I am new to Magento. working on magento 1.7 I need to implement DOB in registration form for that I went to Configuration-> Customer Configuration ->Name and Address Options and selected Show Date of Birth to optional. but it gave me error
Cannot share customer accounts globally because some customer accounts with the same emails exist on multiple websites and cannot be merged.
I changed Share Customer Accounts to Per Website form Global. its a multi store so my question is what effects it will have on my multi store from changing global to per website ? any login issues or multiple email issue. Any help will be appreciated