fix(BOOK-138): Fixed several issues after country map functionality was added

* fix(BOOK-138): Fixed issue when hovering markers and info windows for both city cluster marker as city markers.

Approved-by: Matilda Landström

packages/trpc/lib/routers/contentstack/destinationCountryPage/utils.ts

@@ -128,8 +128,15 @@ export async function getCityPages(
 
   const publishedCities = cities[apiCountry].filter((city) => city.isPublished)
 
+  // It happens we receive duplicate cities with the same city identifier.
+  // Remove duplicate cities based on city identifier
+  const uniquePublishedCities = publishedCities.filter(
+    (city, index, self) =>
+      index === self.findIndex((c) => c.cityIdentifier === city.cityIdentifier)
+  )
+
   const cityPages = await Promise.all(
-    publishedCities.map(async (city) => {
+    uniquePublishedCities.map(async (city) => {
       if (!city.cityIdentifier) {
         return null
       }