Hi i'm new with java web develpment i wrote a simple play framework app with java i want to save some contact in a ebean database it works well in my pc i deployed my app in heroku and i'm using postgres plugin

the problem is when i POST the following request i get that error req:/contacts/post?name=name&email=email%40mail.com&phone=234234

err: play.api.UnexpectedException: Unexpected exception[PersistenceException: ERROR executing DML bindLog[] error[ERROR: null value in column "id" violates not-null constraint\n Detail: Failing row contains (null, name, 234234, email@mail.com).]]

but if i add &id=223434 it works well!!