fix isAlreadySubbmitedSolution

service/src/main/java/com/telephoners/krakyournet/ctf/repositories/SolutionsRepository.java

@@ -52,9 +52,11 @@ public class SolutionsRepository extends Repository<Solution>
 
     private boolean isAlreadySubmittedSolution(Solution solution)
     {
-        return !datastore.find(Solution.class)
-                .filter("flag.value", solution.getFlag().getValue())
-                .asList()
+        List<Solution> solutions = datastore.find(Solution.class)
+                .filter("flag.value", solution.getFlag().getValue()) //todo: do not filter by field
+                .filter("team.name", solution.getTeam().getName()) //todo: whole object instead
+                .asList();
+        return !solutions
                 .isEmpty();
     }