diff --git a/packages/blog2/src/client/composables/useBlogCategory.ts b/packages/blog2/src/client/composables/useBlogCategory.ts
index 1e9b9274441c..2d816809c969 100644
--- a/packages/blog2/src/client/composables/useBlogCategory.ts
+++ b/packages/blog2/src/client/composables/useBlogCategory.ts
@@ -34,6 +34,16 @@ export const useBlogCategory = <
       "";
 
     const routes = router.getRoutes();
+
+    if (!blogCategoryMap.value[mapKey])
+      throw new Error(
+        `useBlogCategory: ${
+          key
+            ? `key ${key} is invalid`
+            : "can not bind to an exisiting key on non blog pages"
+        }`
+      );
+
     const currentMap = blogCategoryMap.value[mapKey][routeLocale.value];
     const result: BlogCategoryData<T> = {
       path: currentMap.path,
diff --git a/packages/blog2/src/client/composables/useBlogType.ts b/packages/blog2/src/client/composables/useBlogType.ts
index d75f25fe8171..007e660e6f35 100644
--- a/packages/blog2/src/client/composables/useBlogType.ts
+++ b/packages/blog2/src/client/composables/useBlogType.ts
@@ -32,6 +32,15 @@ export const useBlogType = <
         ?.key ||
       "";
 
+    if (!blogTypeMap.value[mapKey])
+      throw new Error(
+        `useBlogType: ${
+          key
+            ? `key ${key} is invalid`
+            : "can not bind to an exisiting key on non blog pages"
+        }`
+      );
+
     const routes = router.getRoutes();
     const configMap = blogTypeMap.value[mapKey][routeLocale.value];
     const result: BlogTypeData<T> = {