Array
(
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                            [class] => Doctrine\ORM\ORMException
                            [trace] => Array
                                (
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                                            [line] => 294
                                            [args] => Array
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                                            [line] => 154
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                                            [class] => Rest\RestBundle\Controller\CourseController
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                                                    [1] => Array
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                                            [line] => 3389
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