Update/delete queries cannot be typed JPA

The declaration of the EntityManager methods are the following:

Query createQuery(java.lang.String qlString)
<T> TypedQuery<T> createQuery(java.lang.String qlString, java.lang.Class<T> resultClass)
// The other three method is not relevant here

From this, you can clearly see, that you get a TypedQuery<T> because of the second parameter. If you remove it, you will get a simple Query object. That is what you need.

Try removing the TrainingEntry.class argument when calling createQuery(), since this is what makes it a "typed" query.