diff --git a/CHANGELOG.md b/CHANGELOG.md
index a421bafc..4c8315ed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@ This is the rolling changelog for TShock for Terraria. Use past tense when addin
 * Fixed `/home` allowing players to bypass the respawn timer. (@hakusaro, @moisterrific, @Arthri)
 * Added the config option `SuppressPermissionFailureNotices`. When set to `true`, the server will not send warning messages to players when they fail a build permission check from `TSPlayer.HasBuildPermission` (even if `shouldWarnPlayer` is set to true. (@hakusaro)
 * Fixed `/warp send` failing a nullcheck if the warp didn't exist. The previous behavior may have always been buggy or broken. In other words, sending someone to a warp that doesn't exist should result in a nicer error. (@hakusaro, @punchready)
+* Fixed `/group del` allowing server operators to delete the default group that guests are put into. This is a really critical group and the server doesn't behave correctly when it happens. As a result, it's better to prevent this from happening than not. Additionally, `GroupManagerException`s will be thrown if this is attempted programmatically. Finally, if the exception is thrown in response to `/group del` (or if any other exception is thrown that the command handler can handle), the stack trace will no longer be present. This was reported long ago but I can't find the report anymore. If you know who reported this or if you reported it and want credit, please send @hakusaro a note. (@hakusaro)
 
 ## TShock 4.5.4
 * Fixed ridiculous typo in `GetDataHandlers` which caused TShock to read the wrong field in the packet for `usingBiomeTorches`. (@hakusaro, @Arthri)
diff --git a/TShockAPI/Commands.cs b/TShockAPI/Commands.cs
index 5ea9d5ee..0dbe6980 100644
--- a/TShockAPI/Commands.cs
+++ b/TShockAPI/Commands.cs
@@ -3498,7 +3498,7 @@ namespace TShockAPI
 
 						try
 						{
-							string response = TShock.Groups.DeleteGroup(args.Parameters[1]);
+							string response = TShock.Groups.DeleteGroup(args.Parameters[1], true);
 							if (response.Length > 0)
 							{
 								args.Player.SendSuccessMessage(response);
@@ -3506,7 +3506,7 @@ namespace TShockAPI
 						}
 						catch (GroupManagerException ex)
 						{
-							args.Player.SendErrorMessage(ex.ToString());
+							args.Player.SendErrorMessage(ex.Message);
 						}
 					}
 					#endregion
@@ -3542,7 +3542,7 @@ namespace TShockAPI
 						}
 						catch (GroupManagerException ex)
 						{
-							args.Player.SendErrorMessage(ex.ToString());
+							args.Player.SendErrorMessage(ex.Message);
 						}
 					}
 					#endregion
diff --git a/TShockAPI/DB/GroupManager.cs b/TShockAPI/DB/GroupManager.cs
index 3bc66adb..7b3b62dd 100644
--- a/TShockAPI/DB/GroupManager.cs
+++ b/TShockAPI/DB/GroupManager.cs
@@ -456,6 +456,13 @@ namespace TShockAPI.DB
 				return "Error: Group doesn't exist.";
 			}
 
+			if (name == Group.DefaultGroup.Name)
+			{
+				if (exceptions)
+					throw new GroupManagerException("Unable to remove default guest group.");
+				return "Error: Unable to remove the default guest group.";
+			}
+
 			if (database.Query("DELETE FROM GroupList WHERE GroupName=@0", name) == 1)
 			{
 				groups.Remove(TShock.Groups.GetGroupByName(name));