Two dates of publication for classical works

I need help.

I am trying to get an in-text citation showing both the date of the original work and the date of the publication I am reading, and I cannot seem to get Zotero to do this. I have attempted putting the following into the extra field but it still refuses to work.
original-date: 1763
{original-date: 1763}

Please can someone help, Zotero is sending me crazy

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