Inserting second reference deletes the other reference already there.

I’m experiencing an issue with Zotero. When I insert a reference, it removes the other reference I had inserted.

e.g. Local studies provide evidence of heavy metal pollution and highlight the potential risks Pb, Hg and As to local ecology and human health. (Hu et al., 2015)

When I go to insert another reference to support this claim, the Hu et al. Disappears and I’m just left with this;
Local studies provide evidence of heavy metal pollution and highlight the potential risks Pb, Hg and As to local ecology and human health. (Sun et al., 2020)

I want it to display;

Local studies provide evidence of heavy metal pollution and highlight the potential risks Pb, Hg and As to local ecology and human health. (Sun et al., 2020, Hu et al., 2015)


Can you help?
  • edited February 8, 2020
    What are the exact steps you're taking to insert the second reference?

    You should be able to click on the existing citation, click Add/Edit Citation (which should bring up the citation dialog with the existing citation showing), and then add a second citation in the same dialog.
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