[rake mass:create] fail if same mac or ip are defined multiple times

> CSV=./doc/sophia-clusters-mass-create-full.csv   rake mass:create  [1]
/usr/bin/rake:25: warning: csv was loaded from the standard library, but will no longer be part of the default gems starting from Ruby 3.4.0.
You can add csv to your Gemfile or gemspec to silence this warning.
e0:db:55:fd:3a:47 as mac_prod is used 2 times (mercantour1,esterel6)
e0:db:55:fd:3a:2f as mac_prod is used 2 times (mercantour1,esterel7)
e0:db:55:fd:39:96 as mac_prod is used 2 times (mercantour1,esterel7)
e0:db:55:fd:39:e7 as mac_prod is used 2 times (mercantour1,esterel8)
e0:db:55:fd:38:5e as mac_prod is used 2 times (mercantour1,esterel9)
e0:db:55:fd:3a:20 as mac_prod is used 2 times (mercantour1,esterel10)
e0:db:55:fd:39:87 as mac_prod is used 2 times (mercantour1,esterel10)
e0:db:55:fd:3a:02 as mac_prod is used 2 times (mercantour1,esterel10)
e0:db:55:fd:39:69 as mac_prod is used 2 times (mercantour1,esterel11)
e0:db:55:fd:39:d5 as mac_prod is used 2 times (mercantour1,esterel12)
e0:db:55:fd:38:d9 as mac_prod is used 2 times (mercantour1,esterel12)
e0:db:55:fd:38:7f as mac_prod is used 2 times (mercantour1,esterel13)
e0:db:55:fd:2f:d0 as mac_prod is used 2 times (mercantour1,esterel14)
e0:db:55:fd:39:81 as mac_prod is used 2 times (mercantour1,esterel15)
34:17:eb:e7:25:01 as mac_prod is used 2 times (mercantour1,esterel16)
e0:db:55:fd:39:ab as mac_prod is used 2 times (mercantour1,esterel17)
34:17:eb:e8:81:e6 as mac_prod is used 2 times (mercantour2,esterel19)
34:17:eb:e8:83:7e as mac_prod is used 2 times (mercantour2,esterel20)
34:17:eb:e8:83:75 as mac_prod is used 2 times (mercantour2,esterel20)
34:17:eb:e8:83:72 as mac_prod is used 2 times (mercantour2,esterel21)
34:17:eb:e8:83:84 as mac_prod is used 2 times (mercantour2,esterel22)
34:17:eb:e8:83:00 as mac_prod is used 2 times (mercantour2,esterel23)
34:17:eb:e8:82:bb as mac_prod is used 2 times (mercantour2,esterel24)
50:9a:4c:6c:38:af as mac_prod is used 2 times (mercantour3,esterel24)
50:9a:4c:6c:39:82 as mac_prod is used 2 times (mercantour3,esterel25)
50:9a:4c:6c:38:d9 as mac_prod is used 2 times (mercantour3,esterel26)
50:9a:4c:6c:39:53 as mac_prod is used 2 times (mercantour3,esterel27)
50:9a:4c:6c:38:9e as mac_prod is used 2 times (mercantour3,esterel28)
50:9a:4c:6c:39:31 as mac_prod is used 2 times (mercantour3,esterel29)
50:9a:4c:6b:5d:b0 as mac_prod is used 2 times (mercantour3,esterel30)
50:9a:4c:85:c8:15 as mac_prod is used 2 times (mercantour3,esterel30)
50:9a:4c:70:fa:7a as mac_prod is used 2 times (mercantour3,esterel30)
50:9a:4c:70:fa:3c as mac_prod is used 2 times (mercantour3,esterel30)
50:9a:4c:70:fa:7c as mac_prod is used 2 times (mercantour3,esterel31)
50:9a:4c:70:aa:e1 as mac_prod is used 2 times (mercantour3,esterel31)
50:9a:4c:6c:38:ad as mac_prod is used 2 times (mercantour3,esterel31)
50:9a:4c:6c:38:6b as mac_prod is used 2 times (mercantour3,esterel31)
50:9a:4c:6c:39:85 as mac_prod is used 2 times (mercantour3,esterel32)
50:9a:4c:6c:39:89 as mac_prod is used 2 times (mercantour3,esterel33)
24:6e:96:81:28:dc as mac_prod is used 2 times (mercantour4,esterel34)
6c:2b:59:9c:4a:32 as mac_prod is used 2 times (mercantour5,esterel35)
6c:2b:59:9c:3f:3a as mac_prod is used 2 times (mercantour5,esterel35)
6c:2b:59:9c:4a:6d as mac_prod is used 2 times (mercantour5,esterel36)
6c:2b:59:9a:05:c4 as mac_prod is used 2 times (mercantour5,esterel37)
F4:02:70:B9:2B:B6 as mac_prod is used 2 times (mercantour6,esterel38)
F4:02:70:B9:60:34 as mac_prod is used 2 times (mercantour7,esterel39)
rake aborted!
Some values are used multiple times
/home/enjolras/taf/grid5000/reference-repository/lib/refrepo/csv_importer.rb:23:in `csv_create_input_files'
/home/enjolras/taf/grid5000/reference-repository/Rakefile:347:in `block (2 levels) in <top (required)>'
/home/enjolras/taf/grid5000/reference-repository/.bundle/ruby/3.3.0/gems/rake-13.0.6/exe/rake:27:in `<top (required)>'
Tasks: TOP => mass:create
(See full trace by running task with --trace)