Error de sintaxis con KEY EXTRANJERA en CREATE TABLE

Estoy consiguiendo la salida siguiente en depurador. No estoy seguro de qué sintaxis falta.

El código SQL es:

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• Cambiar la clave principal de una tabla en SQLite
• Android SQLite - Nueva tabla VS. Nueva base de datos
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CREATE TABLE weeks(Week_Id INTEGER PRIMARY KEY, Day TEXT, Start_Time Text, End_Time Text, Break_Time Text ); CREATE TABLE projects(Project_Id INTEGER PRIMARY KEY, Name TEXT, Description Text, Client_Name Text, Location Text ); CREATE TABLE timesheets(Timesheet_Id INTEGER PRIMARY KEY, Project_Id INTEGER, FOREIGN KEY (Project_Id) REFERENCES projects (Project_Id), Week_Id INTEGER, FOREIGN KEY (Week_Id) REFERENCES weeks (Week_Id)); 

El error se reduce a:

 12-09 12:34:20.782: E/SQLiteLog(6490): (1) near "Week_Id": syntax error 

 CREATE TABLE timesheets(Timesheet_Id INTEGER PRIMARY KEY, Project_Id INTEGER, Week_Id INTEGER, FOREIGN KEY (Project_Id) REFERENCES projects (Project_Id), FOREIGN KEY (Week_Id) REFERENCES weeks (Week_Id)); 

 CREATE TABLE timesheets(Timesheet_Id INTEGER PRIMARY KEY, Project_Id INTEGER REFERENCES projects (Project_Id), Week_Id INTEGER REFERENCES weeks (Week_Id));