I didn't place that there... Hmmmm.... Derp.
But it's a bench item, something that had been used in the object files for this map. I'm rather certain that this has something to do with conflict files that you might have in your copy of the game. Objects that are using the same names and material files, or even things that are missing.
A simple fix for this would really be to download the map again, and install ALL things again and making sure that you OVERWRITE the existing files in your folder(Accepting and overwriting when using the .exe, or copy, paste and replace if installing it manually from the .zip).
Either the first download was missing something.
You have another map or object groups that interfere with this maps ones.
Or you've edited or moved away the files the map looks for.
Hence a re-install of the map and making sure the game get ALL the files from the download in the folder and replace any interfering ones should help.