When I first arrived on Nar Shaddaa I noticed that Dezanti replaced Tienn Tubb. That was fine: I deleted any files in my Ovverride that might cause the problem, then I proceeded to play the game. I got to the point where I need Tienn to replace the transponder codes, but I can't because its Dezanti there instead of Tienn. 
 Can fix this without restarting the entire planet?:confused:
  
 
  
  
    Do you have a n_duros001.utc file in your override folder?
 
 
 ...in this case it overrides Tienns's .utc...remove it and reload a game prior to the arrival to Nar Shadaa...
  
 
  
  
    In this case, the file n_duros001.utc, whose TemplateResRef is "n_duros001.utc" was not unique.
 
 There are in fact 7 such .utc files in the game:
 
 findrefs -2cq n_duros001
 
 201TEL_s.rim n_duros001.utc TemplateResRef 'n_duros001'
 203TEL_s.rim n_duros001.utc TemplateResRef 'n_duros001'
 209TEL_s.rim n_duros001.utc TemplateResRef 'n_duros001'
 301NAR_s.rim n_duros001.utc TemplateResRef 'n_duros001'
 351NAR_s.rim n_duros001.utc TemplateResRef 'n_duros001'
 352NAR_s.rim n_duros001.utc TemplateResRef 'n_duros001'
 401DXN_s.rim n_duros001.utc TemplateResRef 'n_duros001'
 
 
 In addition, the Tag field itself ("Duros") is not unique either:
 
 findrefs -2cq Duros
 
 301NAR_s.rim n_duros001.utc Tag 'Duros'
 templates.bif n_duros.utc Tag 'Duros'
  
 
  
  
    @ D333 
 
 Yes, I had n_duros001.utc in my override intended for the Dezanti on Dxun. Alas, I removed it but he wouldn't go away, so I had to restart the planet. 
 
 @ tk
 
 Wow, they use it 7 times!? Thats a bit annoying. Ah well, thanks for the info!
 
 
 
 Thank you both for your help.:)
  
 
  
  
    Yeah, no wonder Obisidian didn't have TSL install with an Override folder by default. :)