WordPress database error: [Field 'subscription_settings'

WordPress database error: [Field 'subscription_settings' doesn't have a default value] INSERT INTO wp_subscriptions (subscription_email,subscription_note,subscription_created,subscription_type,user_key,confirmation_flag) VALUES ('ls@***********.com','User subscribed',1379899140,'Follow Button','fc0942326fb6d687',0)

I have a totally clean install. Only plugins installed are:
1. wpmudev developer
2. Domain Mapping
Subscribe by email.