sentry small fix

src/database/unMastersService/index.ts

@@ -98,8 +98,8 @@ export function getMastersByCountryOfOrigin() {
 
     countryBlocks.push({
       country,
-      count: mastersList.length,
-      masters: mastersList
+      count: mastersList?.length ?? 0,
+      masters: mastersList ?? []
     });
   }
 
@@ -123,8 +123,8 @@ export function getMastersByYearOfCompletion() {
 
     yearBlocks.push({
       year,
-      count: mastersList.length,
-      masters: mastersList
+      count: mastersList?.length ?? 0,
+      masters: mastersList ?? []
     });
   }