1 - Log in to your account on the HitBTC exchange website and go to the “API keys” section - https://hitbtc.com/settings/api-keys
2 - Select the key you created for use in your J'JO account, click on the button with a pen icon in the “Actions” column and go to the section of editing the key data, click on the “Edit” button.
3 - In the tab that opens, click “Clear all”. This will remove the old addresses.
4 - After deleting the old ones, copy the new IP addresses obtained from J'JO into the same row, click “Add” to add the addresses and then “Save” to save them.
5 - Click “Save” at the bottom of this window and now the new, correct IP addresses have been added to your API key. This should save the new addresses.