Why do I get an error when building the Business Data Model for Getting Started tutorial?

I am working my way through the Bonita 7.7 getting-started-tutorial. I have installed version Bonita Community Edition Version 7.7.2.

When I click finish on Manage Business Data Model dialogue box, the Deploy Failed box appears.

Among a lot of other stuff, it says, "org.h2.jdbc.JdbcSQLException: NULL not allowed for column "DESTINATION"; SQL statement: alter table TRAVELREQUEST add column DESTINATION varchar(255) not null [23502-175]

The data has a definition for each TravelRequest. All the data is displayed when I Preview the page.