SQL error in migration 2.0.1 to 2.5

Hi. I’m trying to update an installation from 2.0.1 to 2.5. MySQL is 5.6.34; PHP is 5.5.38. When I follow the prompt to update my database, I get:

SQL error in migration: Mysqli statement execute error : Incorrect datetime value: ‘0000-00-00 00:00:00’ for column ‘stopped’ at row 1.
exception ‘Zend_Db_Statement_Mysqli_Exception’ with message ‘Mysqli statement execute error : Incorrect datetime value: ‘0000-00-00 00:00:00’ for column ‘stopped’ at row 1’ in /home/vfc/vermontfolklifecenter.org/digital-archive/collections/application/libraries/Zend/Db/Statement/Mysqli.php:214

Is this error familiar to anyone?

Thanks!