Error Log entries

Hi,

I am seeing three error log entries…

WordPress database error Duplicate key name ‘type’ for query ALTER TABLE ttc2016_mailpoet_scheduled_tasks ADD KEY type ………….
WordPress database error Duplicate key name ‘status’ for query ALTER TABLE ttc2016_mailpoet_scheduled_tasks ADD KEY status ………
WordPress database error Duplicate key name ‘task_id’ for query ALTER TABLE ttc2016_mailpoet_sending_queues ADD KEY task_id ……..

What’s happening here?