When loading any task record there are non consistent amount of errors popping up on the top of the record that state:
java.sql.BatchUpdateException: Duplicate entry 'XXXXX' for key '[field name]' on task records
Where XXX is the data within the field name. An example of this could be:
java.sql.BatchUpdateException: Duplicate entry 'Default' for key 'title' on task records
This would denote that during the batch update there were two records where the title field had two entries of Default.
Find and delete the record that is a duplicate.