Still, having serparate fields for multiple editions is a pretty essential referencing tool. Zotero has been out long enough for this to have been sorted without users need to resort to "tricks"
Adding the fields formally to items is coming in the next major update after Zotero 5.0 (there were some major technical changes to Zotero needed before any field changes could be made).
Adding the data to the Extra field is not a "trick", but is well-supported by Zotero's citation processor.
Upgrade Storage
LiborA: this was an addition made in response to this and similar request threads. And yes, it should be documented somewhere!
Adding the data to the Extra field is not a "trick", but is well-supported by Zotero's citation processor.