error on require

[Sam TH]

I get this error loading this package:

/home/samth/.plt-scheme/planet/300/4.2.2.6/cache/schematics/benchmark.plt/2/1/benchmark.ss:104:15: module: identifier is already imported at: make-statistics in: (define-values (struct:statistics make-statistics statistics? statistics-mean1 statistics-mean2 statistics-std-dev1 statistics-std-dev2 statistics-slowdown) (let-values (((struct: make- ? -ref -set!) (syntax-parameterize ((struct-field-index (lambda (st...