data: validateWikiData: fix messaging for mismatch one-ref-type

1 files changed, 4 insertions, 2 deletions

diff --git a/src/data/things/validators.js b/src/data/things/validators.js
index ea4303fc..f60c363c 100644
--- a/src/data/things/validators.js
+++ b/src/data/things/validators.js
@@ -484,8 +484,10 @@ export function validateWikiData({
         throw new TypeError(`Expected array of unmixed reference types, got multiple: ${types()}`);
       }
 
-      if (referenceType && !allRefTypes.has(referenceType)) {
-        throw new TypeError(`Expected array of ${referenceType}, got array of ${allRefTypes[0]}`)
+      const onlyRefType = Array.from(allRefTypes)[0];
+
+      if (referenceType && onlyRefType !== referenceType) {
+        throw new TypeError(`Expected array of ${referenceType}, got array of ${onlyRefType}`)
       }
 
       OK = true; return true;