Cascading choices with repeated options: "You must have set `allow_choice_duplicates` setting in your settings sheet

Greetings,

I am brand new to Kobo, and have been trying to create a cascading select form which includes some path-dependent duplicate choices. It is for a household survey of cardiovascular meds, and we are trying to create a survey that gives data collectors a list of brands/producers based on inn status, dosage and medicine, of which there are many possible combinations. I have tried to eliminate any duplication in the path-dependent names (although not in the labels). At the final level, brand, there is inevitable duplication, because the same producer may make more than one dose of a medicine, and more than one medicine.

When I try to preview the form, I get the “you must have set allow_choice_duplicates setting” error, but I cannot find any guidance on how to do this. Many other users have raised this issue; the response often refers them back to this post:
https://xlsform.org/en/#choice-names.

However this does not resolve my problem, at least through my beginner’s eyes.

I would like to attach spreadsheet which contains the overall questionnaire structure and the medicine data, as well as the sheet that I set up for import to kobo, which I pasted into the form following the instructions given here: http://xlsform.org/en/#cascading-selects. However, I am not allowed to upload, as a new user.
I’m pasting here a sample of the data below (the actual data runs to 360 lines.

Please feel free to treat me as an absolute beginner in any response; though I do read the guidance, no instructions are too basic.

list_name name label medicine dose inn
medicine amlodipine Amlodipine
medicine simvastatin Simvastatin
dose 5amlo 5mg amlodipine
dose 10amlo 10mg amlodipine
dose 10sim 10mg simvastatin
dose 20sim 20mg simvastatin
inn 5amlo_inn Generik INN 5amlo
inn 5amlo_merk Nama dagang/Merk 5amlo
inn 10amlo_inn Generik INN 10amlo
inn 10amlo_brand Nama dagang/Merk 10amlo
inn 10sim_inn Generik INN 10sim
inn 10sim_brand Nama dagang/Merk 10sim
inn 20sim_inn Generik INN 20sim
inn 20sim_brand Nama dagang/Merk 20sim
merk guardian_pharmatama guardian pharmatama 5amlo_inn
merk indofarma indofarma 5amlo_inn
merk novell_ novell 5amlo_inn
merk nufarindo nufarindo 5amlo_inn
merk actapin actapin 5amlo_merk
merk amcor amcor 5amlo_merk
merk belvas_5 belvas 5 5amlo_merk
merk cardisan cardisan 5amlo_merk
merk comdipin_5 comdipin 5 5amlo_merk
merk indofarma indofarma 10amlo_inn
merk novell_ novell 10amlo_inn
merk nufarindo nufarindo 10amlo_inn
merk actapin actapin 10amlo_brand
merk amcor amcor 10amlo_brand
merk belvas_10 belvas 10 10amlo_brand
merk comdipin_10 comdipin 10 10amlo_brand
merk dilavask dilavask 10amlo_brand
merk intervask intervask 10amlo_brand
merk mutiara_mukti_farma mutiara mukti farma 10sim_inn
merk mutifa_industri_farmasi mutifa industri farmasi 10sim_inn
merk novell_pharmaceutical_lab. novell pharmaceutical lab. 10sim_inn
merk pertiwi_agung pertiwi agung 10sim_inn
merk promedrahardjo_farmasi_industri promedrahardjo farmasi industri 10sim_inn
merk rama_emerald_multi_sukses rama emerald multi sukses 10sim_inn
merk sanbe_farma sanbe farma 10sim_inn
merk tempo_scan_pacific tempo scan pacific 10sim_inn
merk tempo_scan_pacific tempo scan pacific 10sim_inn
merk tropica_mas tropica mas 10sim_inn
merk yarindo_farmatama yarindo farmatama 10sim_inn
merk sampharindo_perdana sampharindo perdana 10sim_inn
merk cholestat cholestat 10sim_brand
merk colesbat colesbat 10sim_brand
merk cortavas_10 cortavas 10 10sim_brand
merk esvat esvat 10sim_brand
merk lesvatin lesvatin 10sim_brand
merk lipinorm_10 lipinorm 10 10sim_brand
merk lipivast lipivast 10sim_brand
merk norpid_10 norpid 10 10sim_brand
merk cholestat cholestat 20sim_brand
merk statcol statcol 20sim_brand
merk zencor_20 zencor 20 20sim_brand
merk zencor_40 zencor 40 20sim_brand
merk rechol_20 rechol 20 20sim_brand
merk simvasgen_20 simvasgen 20 20sim_brand
merk cortavas_20 cortavas 20 20sim_brand
merk zochol_40 zochol 40 20sim_brand
merk valemia valemia 20sim_brand
merk errita_pharma errita pharma 20sim_inn
merk ferron_par_pharmaceuticals ferron par pharmaceuticals 20sim_inn
merk graha_farma graha farma 20sim_inn
merk hexpharm hexpharm 20sim_inn
merk ifars ifars 20sim_inn
merk kalbe_farma kalbe farma 20sim_inn
merk kimia_farma kimia farma 20sim_inn
merk lloyd_pharma lloyd pharma 20sim_inn
merk lloyd_pharma lloyd pharma 20sim_inn
merk mulia_farma_suci mulia farma suci 20sim_inn
merk pharos_indonesia pharos indonesia 20sim_inn
merk sampharindo_perdana sampharindo perdana 20sim_inn
merk sanbe_farma sanbe farma 20sim_inn

Many thanks
ep for MedsWatch