I'm not sure what is not clear about the error. As it says, you're trying to add a row whose value for the primary key already exists in the table and you have a constraint on the table that the primary key must be unique.
In other words, you already have a row whose primary key value is (Mar 13 2017 12:00AM, Jun 1 2017 12:00AM). Your table schema forbids you to add another row with that same key.
Two possible solutions:
- remove the constraint on the primary key. Most likely a bad idea.
- do not try to add duplicate rows. Instead you can UPDATE the rows in question.
