[IC1.64][SMP] TileEntityExtractor cannot be cast to TileEntityCrop

Hi,
on my server, I got this error in log "TileEntityExtractor cannot be cast to TileEntityCrop"

i think it is duplicate id in config, but I cant find any. Am I right?

I helped myself.

problem was, upgrade from 1.42 turned all machines into Crop.

so i destroyed all machines in old world, upgraded and now it works