SQLite + Entity Framework 4.0 + Identity column/Autoinc does not work

This is my table:

-- Original t开发者_如何学Cable schema
CREATE TABLE [SchoolYear] (
    [Start] datetime NOT NULL,
    [End] datetime NOT NULL,
    [Id] integer PRIMARY KEY ON CONFLICT ABORT AUTOINCREMENT NOT NULL
);

My Entity in the EF designer has StoredGeneratedPattern set to Identity OR Compute and datatype is int64.

Everytime I insert a second SchoolYear object I get this error:

An object with the same key is already in the ObjectStateManager...

---

Check that the autoincremented property has the StoreGeneratedPattern attribute set to "Identity" in the SSDL part of the model, not in CSDL.
This is a known issue, the conceptual attribute is not taken into account while generating the code.