Error when adding a second feed to my account =(

hi, im trying to add a 2nd feed to my account in a different city, and i get an error

Using latitude: 27.4xxx, longitude: -99.5xxx, altitude: 420ft above sea level

Validating email/location information...ERROR

There has been another feed (MMIO1) registered under this email address!
If you have more than one receiver please contact us at support@flightradar24.com.

If you have lost your sharing key please use the retrieval form at:
http://feed.flightradar24.com/forgotten_key.php

as i know, the sharing key is per feeder, if i use the same key, then my actual feed info will change to the new one.

i have emailed support but no answer.