Actor X already defined, renaming Actor to X@Y.wad

[StroggVorbis]

Example: Let's say we have SmoothDoom.pk3. In the root directory there's a DECORATE.txt with an #include Deco/Weapons directive. Under Deco/Weapons/Pistol, there is the PerkPistol actor which inherits from the base pistol. If I wanted to make a replacement addon for the pistol that is loaded after SmoothDoom, what is the right way to do it?

Can my .pk3 also contain an #include Deco/Weapons directive, or does it need to be named differently, for example Deco2/Weapons or Deco/Weapons2? I get an actor already defined error, even if I call it PerkPistol2. Is it because it points to SmoothDoom's Deco/Weapons directory and not my own? Also, can my pistol replacement inherit from SmoothDoom's Perkpistol or only from the native pistol? Do I have to redefine the Playerclass too?

I'm sorry if this doesn't make any sense or is incomprehensible. I tried to explain it as best as I could. I hope someone understands what I mean and can help me. Thanks in advance :(

[Apeirogon]

Yes, you can. File path works inside single pack only. Other way we have errors when try load different mod which have one same path.
Already defined error? You try replace smootpistol just rewriting it, without change name?

Yes, it can inherit from smoothpistols. Just sure it load after smooth doom.