For further clarification, the error is happening after the commit in the create function.<p>
public String create() {<br />
EntityManager em = getEntityManager();<br />
try {<br />
utx.begin();<br />
em.persist(dayStyleAssignments);<br />
<br />
utx.commit();<br />
addSuccessMessage("DayStyleAssignments was successfully created.");<br />
} catch (Exception ex) {<br />
try {<br />
addErrorMessage(ex.getLocalizedMessage());<br />
utx.rollback();<br />
} catch (Exception e) {<br />
addErrorMessage(e.getLocalizedMessage());<br />
}<br />
} finally {<br />
em.close();<br />
}<br />
return "dayStyleAssignments_list";<br />
}<p>
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