Hey SaOk,
Have you deleted the asset from your folder completely? Did you check in your project folder through the Windows Explorer to make sure that the asset isn’t there in any of the folders? If the file is deleted, have you tried right-clicking in the content browser and using the ‘fix up redirectors’ button?
If this does not work, could you please provide some more information, perhaps a screenshot of the door too?
Looking forward to hearing back from you!