Problem Destroying Component

Hello, I have run into an error that I've never encountered before. This is my code. I have tried both scenarios and I get the same error:

 NetworkBehaviour[] nB = gO.GetComponents<NetworkBehaviour>();
 
                     for (int i = 0; i < nB.Length; i++)
                     {
                         NetworkBehaviour n = nB[i];
                         Destroy(n);
                     }

and this:

 NetworkBehaviour[] nB = gO.GetComponents<NetworkBehaviour>();
 
                     for (int i = 0; i < nB.Length; i++)
                     {
                         Destroy(nB[i]);
                     }

The error I am getting is this:

Destroying assets is not permitted to avoid data loss. If you really want to remove an asset use DestroyImmediate (theObject, true); UnityEngine.Object:Destroy(Object) MyCharacter.Networking.SetUpLocalPlayerDestroyer:Start() (at Assets/MyAssets/Scripts/Game/Multiplayer/SetUpLocalPlayerDestroyer.cs:86)

What am I doing wrong and how can I fix it? If it helps, I am using Unity 2017.3 on windows 10. I have heard that DestroyImmediate() can cause problems, and am not sure why I am getting this anyway. I thought this was when I am trying to destroy an asset, I am certain that's not what i'm doing.