DOUBLE ENTITIES IN NWD FILE

Hi every one,

while exporting the rvm+att file & converting them into nwd , for pipe items and nozz i am able to see two entites refer image

i am not able to understand at what point of operation its generating two entities.

my rvm file is separate (contains insu & color code) & my att files is also separate.

could any one throw some light on this topic

thanks in advance.