fixing a 500 error where duplicate section CRNs would cause a database validation error, rather than a rails validation error
fixing a 500 error where duplicate section CRNs would cause a database validation error, rather than a rails validation error

blerner/bottlenose,blerner/bottlenose,CodeGrade/bottlenose,CodeGrade/bottlenose,blerner/bottlenose,blerner/bottlenose,blerner/bottlenose,blerner/bottlenose,CodeGrade/bottlenose,CodeGrade/bottlenose,CodeGrade/bottlenose,blerner/bottlenose,CodeGrade/bottlenose,CodeGrade/bottlenose