diff --git a/src/App.svelte b/src/App.svelte
index 163a092..876f81b 100644
--- a/src/App.svelte
+++ b/src/App.svelte
@@ -186,7 +186,10 @@
        v = v.substring(1)
      }
      path = repo.path;
-     couldhave = METASP[Object.keys(repo.frontmatter).filter(t => t.startsWith("has_"))[0].split("has_")[1]].tiers
+     let hastiers = Object.keys(repo.frontmatter).filter(t => t.startsWith("has_"))
+     if (hastiers.length == 1) {
+       couldhave = METASP[hastiers[0].split("has_")[1]].tiers
+     }
      console.log(JSON.stringify(repo))
      generateFrontMatter(repo.frontmatter, path, repo.relpermalink, document.location.protocol.substring(0,4))
    }