I've compiled a list of duplicate ADM1Codes that are duplicated in GeoNames.
Although there are a few duplicates, the main problem is that I don't know how to fix the codes.
Obviously the FeatureCode on every entry in this list is 'ADM1'
Code:
ISO2 ADM1Code idGeoName Name inADM1Codes
---- --------- --------- ----------------------------------------- -----------
BT 15 1252578 Gasa X
BT 15 1337288 Punakha Dzongkhag
---- --------- --------- ----------------------------------------- -----------
GE 00 6643410 Ap'khazet'is Avtonomiuri Respublika
GE 00 865543 Samegrelo-Zemo Svanet'i X
---- --------- --------- ----------------------------------------- -----------
IQ 00 6686132 Ostan-e Dialeh
IQ 00 6686317 Ostan-e Soleymaniyeh
IQ 00 6686103 Ostan-e Soleymaniyeh X
IQ 00 6686131 Ostan-e Soleymaniyeh
---- --------- --------- ----------------------------------------- -----------
KH 16 1822210 Khet Siemreab-Otar Meanchey X
KH 00 1899273 Khett Banteay Mean Cheay
KH 16 1822213 Khett Siem Reab
KH 00 1830103 Krong Phnum Penh X
KH 00 1899262 Krong Preah Seihanu
---- --------- --------- ----------------------------------------- -----------
KI 00 2110215 Gilbert Islands District X
KI 00 4030940 Line Islands District
---- --------- --------- ----------------------------------------- -----------
KZ 00 1522534 Kokshetau Oblysy
KZ 00 1519414 Semey Oblysy
KZ 00 1518546 Taldyqorghan Oblysy
KZ 00 1517961 Torghay Oblysy X
KZ 00 1524381 Zhezqazghan Oblysy
---- --------- --------- ----------------------------------------- -----------
LV 00 460311 Dobeles Rajons
LV 00 459281 Jelgava
LV 00 459278 Jelgavas Rajons
LV 00 459202 Jurmala X
---- --------- --------- ----------------------------------------- -----------
MD 00 858880 Balti Judetul
MD 00 858883 Cahul Judetul
MD 00 858793 Cainari Raionul
MD 00 618145 Camenca Raionul
MD 00 618448 Ceadir-Lunga Raionul
MD 00 618041 Comrat Raionul
MD 00 858892 Edinet Judetul
MD 00 618233 Grigoriopol Raionul
MD 00 858896 Lapusna Judetul
MD 00 858897 Orhei Judetul
MD 00 617485 Ribnita Raionul
MD 00 617382 Slobozia Raionul
MD 00 858906 Soroca Judetul
MD 00 858909 Tighina Judetul
MD 00 858828 Tiraspol Municipiul
MD 00 858910 Ungheni Judetul
MD 00 617095 Vulcanes Raionul X