getChronologyRelations: don't count the same thing twice

1 files changed, 1 insertions, 1 deletions

diff --git a/src/content/util/getChronologyRelations.js b/src/content/util/getChronologyRelations.js
index cdfdef39..4b7d9ce5 100644
--- a/src/content/util/getChronologyRelations.js
+++ b/src/content/util/getChronologyRelations.js
@@ -5,7 +5,7 @@ export default function getChronologyRelations(thing, {
   getThings,
 }) {
   return contributions.map(({who}) => {
-    const things = getThings(who);
+    const things = Array.from(new Set(getThings(who)));
     const index = things.indexOf(thing);
     const previous = things[index - 1];
     const next = things[index + 1];