Hi Jeff,
Thanks for adding me to this topic. I’ve sent this topic to our support team to take care of this issue and @TTNFipronet would soon receive answers or you can contact via iot.support@milesight.com.
Could you send me your email via private chat so we can continue the discussion since last January?
Ivete
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I want to clear some things here, I jumped into LoRaWAN with no prior experience and as the result I’ve made many mistakes. @cslorabox is definitely right, but UG65 users are able to establish TTN connection using TTN packet forwarder (which is not available as of right now as far as I’ve experienced, but hopefully will be).
And as I learnt more, I realized I did not delete the gateway with EUI of 24E124FFFEF12023. I deleted the gateway with an ID of “eui-eui-24E124FFFEF12023”, not the real EUI. My only mistake was that I used the gateway EUI 24E124FFFEF12024, but like I said there are still options for them to configure TTN connection. I was not able to register gateway using 24E124FFFEF12023 because it was registered earlier by my companies’ engineers, before I was employed. I still some have questions, but this is not the place for them.
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So to confirm you are now back on line? With original EUI-24E124FFFEF12023 (as never actually deleted?), under ownership of other employee? (note they can add you as collaborator or transfer ownership to you through the console).
Best you spend some time reading up on LORa/LORaWAN and the TTN Docs 
I also have the same issue i removed my gateway and now could not register in either consoles v2 or v3
my gateway eui 58 A0 CB FF FE 80 14 11
please help, thanks
Don’t know about v3, but as I just said on the other thread, not possible on v2.
Please don’t double post.
Hi all
I’ve registered approx. 70 gateways without a problem until this morning when I’m getting the following issue on the v3 console: The Things Network Console
A gateway with EUI 00800000A0004C40 is already registered as eui-00800000a0004c40.
To the best of my knowledge I haven’t registered this gateway before as I tend to add them to the console on the morning of the installs
How can I get this device registered?
It is a Multitech IP67 gateway
Thanks Steve
The alternate gw appears to be ‘live’ in th V2 noc… and is located here https://www.google.co.uk/maps/place/40°41’59.3"N+14°28’58.9"E/@40.7130167,14.4877124,12z
If the data is to be believed. Perhaps you can reach out to owners/communities in Italy to find out if genuine or incorrect MAC derived EUID… you have double double checked your own typing, right? Can I’d be changed in gw firmware? What does Multitech support say wrt potential duplication?
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Thanks Jeff
It looks as though the device is located on the beach front at Pompeii!! i wonder whether work would pay for a trip just to check!! 
I’m awaiting it to come online so I can check the Multitech console and see whether I have made a typo. Failing that I will do as you suggest. Multitech have suggested a solution also
Cheers Steve
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There isnt a local community nearby so difficult to identify the owner, though the main TTN global map shows 2 x Multitech GW’s in close proximity - it may be same GW registered under slightly different info - have seen similar before. Good luck with the investigations…
Hi Albert, I would like to know if you were able to solve your problem with the account you deleted and the duplicate EUI that did not let you register your gateway from your new account.
I’m Alicia, in 2021 and I have the same problem, in a panic attack I deleted my TTN account without removing the devices and I can’t do anything!
If you were able to solve it I would love to know how you did it.
Greetings from Mexico
You’ve asked a question of someone from 2018 - things have totally changed since then.
As v2 is read-only, I’m guessing you must be trying to register on v3.
What is the manufacturer & model of the gateway - maybe there is a way to change it’s EUI.
Yes, what a pity to ask this kind of questions, isn’t it? I’m super novice!!
My equipment is a RAK Wisgate 7268 for indoor use.
@BoRRoZ Hi
I have some issues with a few devices.
Last time you helped me out.
Who have i to contact, to let delete some devices out of the TTN Network?
Not the devices registered in my TTN account, but more on the TTN side (backend, frontend, db)…
I’m going crazy with a few devices and i think only this can help me out here.
Thank you and kind regards
Albert
Can you be more specific as to which devices you are having a problem with and the nature of the problem?
Note also
If they are not in your account but are registered to another owner then you will not be able to request deletion, unless they were previously yours and you have since deleted them…in which case they should have gone from the system and we may need to ask the TI core team to investigate further - unless the relevant device id’s cant be used again, ofcourse…
…as stated need more details for Forum team or Mods to advise.
Note Borroz is not so active/rarely on the forum these days…
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Hi @Jeff-UK
Thank you for the reply.
It’s about my own devices.
A gateway and a Bosch Parking Lot Sensor.
Both were in a Application on TTN and i Deleted the Devices and the Application and Also once the Gateway.
Since i reinstalled and reconfigured both, it doesn’t work smoothly.
Sometimes up- and downlinks don’t achieve and sometimes even the joining of the devices don’t succes.
Also sometimes i see in live data (Application) that my gateway is not connected,
but when i look in the live data (Gateway) it shows my Gateway runs well.
So i think it’s an issue, because i deleted both a few times and so on.
Sorry for this chaos and i hope you can help me.
Have a nice evening and kind regards
Albert
true 
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Hello!
I am totaly new to TTN. I got my first gateway Dragino LPS8 today. I startet with a new account on TTN. The unboxed to LPS8, powered up, changed the IP to my LAN, Updated the Firmware. Connection to Internet is OK. Gateway EUI is a8404121d1504150
Now I tried to register the Gateway. But - no way - EUI is already used. As I saw in the LPS8 on Page LoRaWAN the TTN Server data was already in.
I read a lot of posts out there, but it seem that the wrong entry has to be deleted by an admin…
Does it take any further step? Please help
best regards
rezloppo
GW EUI already used or GW ID already used? There is a difference…you chose the ID (its for your convenient ref) and if you chose a simple one that might already be used by another gw owner that can be an issue - a good chance something like “mylps8” could be used but less so “rezlopposlps8no1”! Also double check you have types correctly…
That is likely just the manufacturer pre-populating settings to allow easy set up - GW’s often support a few networks out of the box. Are settings pre configured for latest TTN(CE) aka v3 or still set for old V2 server settings? (“eu1.cloud…”, “nam1.cloud…”,“au1.cloud…” etc depending on region not “router…”)
I use(d) different name on gateway ID
the message is:
{
“code”: 6,
“message”: “error:pkg/identityserver:gateway_eui_taken (a gateway with EUI A8404121D1504150 is already registered as a8404121d15041505)”,
“details”: [
{
“@type”: “type.googleapis.com/ttn.lorawan.v3.ErrorDetails”,
“namespace”: “pkg/identityserver”,
“name”: “gateway_eui_taken”,
“message_format”: "a gateway with EUI {gateway_eui} is already registered as {gateway_id}",
“attributes”: {
“gateway_eui”: “A8404121D1504150”,
“gateway_id”: “a8404121d15041505”
},
“correlation_id”: “b8d5e626e9b845fb8ea207840bb14d07”,
“code”: 6
}
]
}
The presetting in Dragino is/was for TTN V3 with eu1.cloud.thethings.network
I also tried to claim the gateway but i do not have a “claimauthentication code” for the Dragino LPS8
Any Ideas?