The issue is that the default account-level salutation (Name_Id 0) has been marked Inactive.  This may have been done in error because the account level records should always be active on active accounts.  

To correct this, go to Salutation Entry for the account, select the salutation that corresponds to the Name ID 0 record (it will have "(Account)" as the last part of the name), then change the status to 'A'.

After taking these steps, the user should be able to work in the batch record again as normal.