What is the /zotero/pipes folder? Impossible to copy for a back up

What is the "pipes" folder and is it's content important to copy when creating a back up?

In the Zotero "storage" folder in linux, there is a "pipes" folder.
Mine contain one document of "unknown" type and 0 byte with a 13 digit figure as title. What does it do?
I can't copy it and therefore worry about the integrity of my back up copy (I intend to uninstall and re-install Zotero). If it is indeed important, any idea on how to save it?

Thank you for your help!!!!!!!!
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