NAs in DemultiplexStats.tsv crashes the treatment insertion

If NA values are find in the DemultiplexStats.tsv file, the demultiplexStat treatment is trying to store this value as java.lang.Long.
So, an type error is raised

400 Bad Request - {"default.bcOneMismatch.value":["Mauvais type : java.lang.Long / NA"]}
  $VAR1 = bless( {
                   'default' => {
                                  'bcPerfect' => bless( {
                                                          'value' => '7837578',
                                                          '_type' => 'single'
                                                        }, 'Property' ),
                                  'project' => bless( {
                                                        'value' => 'GLYCADAPT',
                                                        '_type' => 'single'
                                                      }, 'Property' ),
                                  'percentageOfFragment' => bless( {
                                                                     'value' => '21.12',
                                                                     '_type' => 'single'
                                                                   }, 'Property' ),
                                  'bcOneMismatch' => bless( {
                                                              'value' => 'NA',
                                                              '_type' => 'single'
                                                            }, 'Property' ),
                                  'barcodeCount' => bless( {
                                                             'value' => '7837578',
                                                             '_type' => 'single'
                                                           }, 'Property' ),
                                  'barcodeSeq' => bless( {
                                                           'value' => 'CGTCTGCG+TTCACAAT',
                                                           '_type' => 'single'
                                                         }, 'Property' )
                                },
                   'categoryCode' => 'sequencing',
                   'typeCode' => 'illuminaDemultiplexStat',
                   'code' => 'illuminaDemultiplexStat'
                 }, 'Treatment' );