Fix ghost role exceptions (#6106)

Content.Server/Ghost/Roles/Components/GhostRoleMobSpawnerComponent.cs

@@ -5,7 +5,9 @@ using JetBrains.Annotations;
 using Robust.Server.Player;
 using Robust.Shared.GameObjects;
 using Robust.Shared.IoC;
+using Robust.Shared.Prototypes;
 using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
 using Robust.Shared.ViewVariables;
 
 namespace Content.Server.Ghost.Roles.Components
@@ -31,7 +33,7 @@ namespace Content.Server.Ghost.Roles.Components
 
         [CanBeNull]
         [ViewVariables(VVAccess.ReadWrite)]
-        [DataField("prototype")]
+        [DataField("prototype", customTypeSerializer: typeof(PrototypeIdSerializer<EntityPrototype>))]
         public string? Prototype { get; private set; }
 
         public override bool Take(IPlayerSession session)

Content.Server/Ghost/Roles/Components/GhostTakeoverAvailableComponent.cs

@@ -1,11 +1,8 @@
-using System;
 using Content.Server.Mind.Commands;
 using Content.Server.Mind.Components;
-using Content.Server.Players;
 using Robust.Server.Player;
 using Robust.Shared.GameObjects;
 using Robust.Shared.IoC;
-using Robust.Shared.Utility;
 
 namespace Content.Server.Ghost.Roles.Components
 {

Content.Server/Ghost/Roles/GhostRoleSystem.cs

@@ -50,7 +50,6 @@ namespace Content.Server.Ghost.Roles
             SubscribeLocalEvent<PlayerAttachedEvent>(OnPlayerAttached);
             SubscribeLocalEvent<GhostTakeoverAvailableComponent, MindRemovedMessage>(OnMindRemoved);
             SubscribeLocalEvent<GhostTakeoverAvailableComponent, MobStateChangedEvent>(OnMobStateChanged);
-
             _playerManager.PlayerStatusChanged += PlayerStatusChanged;
         }
 
@@ -231,8 +230,10 @@ namespace Content.Server.Ghost.Roles
 
         private void OnMindRemoved(EntityUid uid, GhostRoleComponent component, MindRemovedMessage args)
         {
-            if (!component.ReregisterOnGhost)
+            // Avoid re-registering it for duplicate entries and potential exceptions.
+            if (!component.ReregisterOnGhost || component.LifeStage > ComponentLifeStage.Running)
                 return;
+
             component.Taken = false;
             RegisterGhostRole(component);
         }

Resources/Prototypes/Entities/Mobs/Player/human.yml

@@ -34,7 +34,7 @@
     sprite: Markers/jobs.rsi
     state: centcom
   - type: GhostRoleMobSpawner
-    prototype: HumanMob_CentcomOfficial
+    prototype: MobHumanCentcomOfficial
     deleteOnSpawn: true
     makeSentient: false
     name: centcom official