yes, there is. There is a config file that holds your settings for upload.
It is located here:
yourArkDevKitDirectory\projects\shooterGame\Saved\Mods.db
Important Note- I do not know if these settings need to be changed prior to cooking the map (resetting the GUID does.)
So you may need to cook after making a change first.
Open that .db file with a text editor (I prefer notepad ++)
In that you will find a section with your mod
replace the number following “ItemSeamId” with the workshop ID for your original work or your workshop submission you want to replace (this should be the number listed at the end of your workshop item link.)
For example “http://steamcommunity.com/sharedfiles/filedetails/?id=547828060” is the link to my Roraima workshop item. 547828060 is the “itemSeamID.”
You can also change the title to whatever you want with no effect other then what will show as the name on the workshop page. It’s still technically the same workshop submission.