clarify what duplicate does and its limitations
clarify what duplicate does and its limitations

ZuBsPaCe/godot,vkbsb/godot,akien-mga/godot,BastiaanOlij/godot,firefly2442/godot,godotengine/godot,godotengine/godot,akien-mga/godot,vkbsb/godot,akien-mga/godot,DmitriySalnikov/godot,BastiaanOlij/godot,firefly2442/godot,godotengine/godot,Faless/godot,Shockblast/godot,BastiaanOlij/godot,guilhermefelipecgs/godot,sanikoyes/godot,Valentactive/godot,firefly2442/godot,akien-mga/godot,ZuBsPaCe/godot,BastiaanOlij/godot,BastiaanOlij/godot,Shockblast/godot,firefly2442/godot,Faless/godot,godotengine/godot,Valentactive/godot,pkowal1982/godot,Faless/godot,vnen/godot,firefly2442/godot,sanikoyes/godot,DmitriySalnikov/godot,Zylann/godot,sanikoyes/godot,vnen/godot,Shockblast/godot,sanikoyes/godot,Shockblast/godot,josempans/godot,Zylann/godot,vkbsb/godot,Shockblast/godot,firefly2442/godot,guilhermefelipecgs/godot,Faless/godot,pkowal1982/godot,Zylann/godot,Faless/godot,Valentactive/godot,ZuBsPaCe/godot,Zylann/godot,pkowal1982/godot,ZuBsPaCe/godot,ZuBsPaCe/godot,Zylann/godot,pkowal1982/godot,pkowal1982/godot,akien-mga/godot,Valentactive/godot,Valentactive/godot,vkbsb/godot,Valentactive/godot,pkowal1982/godot,josempans/godot,Faless/godot,sanikoyes/godot,Shockblast/godot,josempans/godot,josempans/godot,Zylann/godot,akien-mga/godot,guilhermefelipecgs/godot,guilhermefelipecgs/godot,vnen/godot,godotengine/godot,Valentactive/godot,BastiaanOlij/godot,vkbsb/godot,josempans/godot,godotengine/godot,sanikoyes/godot,vkbsb/godot,Faless/godot,josempans/godot,pkowal1982/godot,josempans/godot,ZuBsPaCe/godot,DmitriySalnikov/godot,vnen/godot,firefly2442/godot,vkbsb/godot,DmitriySalnikov/godot,ZuBsPaCe/godot,sanikoyes/godot,BastiaanOlij/godot,ZuBsPaCe/godot,pkowal1982/godot,DmitriySalnikov/godot,vnen/godot,guilhermefelipecgs/godot,DmitriySalnikov/godot,guilhermefelipecgs/godot,Shockblast/godot,akien-mga/godot,firefly2442/godot,Zylann/godot,guilhermefelipecgs/godot,sanikoyes/godot,Shockblast/godot,guilhermefelipecgs/godot,vkbsb/godot,Zylann/godot,akien-mga/godot,godotengine/godot,josempans/godot,godotengine/godot,vnen/godot,vnen/godot,DmitriySalnikov/godot,vnen/godot,Valentactive/godot,BastiaanOlij/godot,Faless/godot