diff --git a/Content.Server/Antag/AntagSelectionSystem.cs b/Content.Server/Antag/AntagSelectionSystem.cs
index 55c66e8933..d2bc26f20d 100644
--- a/Content.Server/Antag/AntagSelectionSystem.cs
+++ b/Content.Server/Antag/AntagSelectionSystem.cs
@@ -264,7 +264,7 @@ public sealed partial class AntagSelectionSystem : GameRuleSystem<AntagSelection
     /// </summary>
     public void MakeAntag(Entity<AntagSelectionComponent> ent, ICommonSession? session, AntagSelectionDefinition def, bool ignoreSpawner = false)
     {
-        var antagEnt = (EntityUid?) null;
+        EntityUid? antagEnt = null;
         var isSpawner = false;
 
         if (session != null)
@@ -285,17 +285,16 @@ public sealed partial class AntagSelectionSystem : GameRuleSystem<AntagSelection
         {
             var getEntEv = new AntagSelectEntityEvent(session, ent);
             RaiseLocalEvent(ent, ref getEntEv, true);
-
-            if (!getEntEv.Handled)
-            {
-                throw new InvalidOperationException($"Attempted to make {session} antagonist in gamerule {ToPrettyString(ent)} but there was no valid entity for player.");
-            }
-
             antagEnt = getEntEv.Entity;
         }
 
         if (antagEnt is not { } player)
+        {
+            Log.Error($"Attempted to make {session} antagonist in gamerule {ToPrettyString(ent)} but there was no valid entity for player.");
+            if (session != null)
+                ent.Comp.SelectedSessions.Remove(session);
             return;
+        }
 
         var getPosEv = new AntagSelectLocationEvent(session, ent);
         RaiseLocalEvent(ent, ref getPosEv, true);
@@ -313,6 +312,8 @@ public sealed partial class AntagSelectionSystem : GameRuleSystem<AntagSelection
             if (!TryComp<GhostRoleAntagSpawnerComponent>(player, out var spawnerComp))
             {
                 Log.Error($"Antag spawner {player} does not have a GhostRoleAntagSpawnerComponent.");
+                if (session != null)
+                    ent.Comp.SelectedSessions.Remove(session);
                 return;
             }