diff --git a/src/Turnierplan.App/Endpoints/Applications/CreateApplicationEndpoint.cs b/src/Turnierplan.App/Endpoints/Applications/CreateApplicationEndpoint.cs
index 4b220a3f..fdea7b1f 100644
--- a/src/Turnierplan.App/Endpoints/Applications/CreateApplicationEndpoint.cs
+++ b/src/Turnierplan.App/Endpoints/Applications/CreateApplicationEndpoint.cs
@@ -30,7 +30,10 @@ private static async Task<IResult> Handle(
             return result;
         }
 
-        var tournamentPlanner = await tournamentPlannerRepository.GetByPublicIdAsync(tournamentPlannerId, ITournamentPlannerRepository.Includes.TournamentClasses);
+        // Applications must be included in the query to ensure that we can generate a unique application tag
+        var tournamentPlanner = await tournamentPlannerRepository.GetByPublicIdAsync(
+            tournamentPlannerId,
+            ITournamentPlannerRepository.Includes.TournamentClasses | ITournamentPlannerRepository.Includes.Applications);
 
         if (tournamentPlanner is null)
         {