Barcode setup Barodes disappeard

Hello
I am new to this ERP and I just installed it on Linux ubuntu . I have activated Barcode. In Barcode setup , I had several Barcodes defined by default. I enabled Datamatrix , and all default barcodes except C128, C39 disappeared . Datamatrix still in the list but the option to disable ( drop down ) disappeared also.
I have latest Dolibarr 16 installed . any suggestion on how to bring the default back?