diff --git a/mappings/net/minecraft/world/level/storage/LevelSummary.mapping b/mappings/net/minecraft/world/level/storage/LevelSummary.mapping
index 0552dee3aa..b6fed9f3fd 100644
--- a/mappings/net/minecraft/world/level/storage/LevelSummary.mapping
+++ b/mappings/net/minecraft/world/level/storage/LevelSummary.mapping
@@ -28,8 +28,20 @@ CLASS net/minecraft/class_34 net/minecraft/world/level/storage/LevelSummary
 	METHOD method_27429 getDetails ()Lnet/minecraft/class_2561;
 	METHOD method_27430 createDetails ()Lnet/minecraft/class_2561;
 	METHOD method_29586 getVersionInfo ()Lnet/minecraft/class_5315;
+	METHOD method_33405 getConversionWarning ()Lnet/minecraft/class_34$class_5781;
 	METHOD method_33783 isPreWorldHeightChangeVersion ()Z
 		COMMENT Returns whether the level is from a version before the world height was changed to -64 to 320.
 		COMMENT
 		COMMENT <p>This includes world versions {@code 2692} and earlier (21w05b and earlier).
 	METHOD method_33784 isUnavailable ()Z
+	CLASS class_5781 ConversionWarning
+		FIELD field_28440 backup Z
+		FIELD field_28441 boldRedFormatting Z
+		FIELD field_28442 translationKeySuffix Ljava/lang/String;
+		METHOD <init> (Ljava/lang/String;IZZLjava/lang/String;)V
+			ARG 3 backup
+			ARG 4 boldRedFormatting
+			ARG 5 translationKeySuffix
+		METHOD method_33406 promptsBackup ()Z
+		METHOD method_33407 needsBoldRedFormatting ()Z
+		METHOD method_33408 getTranslationKeySuffix ()Ljava/lang/String;