diff --git a/index.html b/index.html
index 8f321d9..aef5c67 100644
--- a/index.html
+++ b/index.html
@@ -1767,7 +1767,9 @@
                         iterations: []
                     }
                 }
-                floGlobals.currentArticle.sections[section].uniqueEntries.add(origin)
+                if (floGlobals.currentArticle.sections[section]) {
+                    floGlobals.currentArticle.sections[section].uniqueEntries.add(origin)
+                }
                 floGlobals.currentArticle.uniqueEntries[origin]['iterations'].push(generalData[key].vectorClock)
             }
             for (const sectionID in floGlobals.currentArticle.sections) {