diff --git a/client/src/redux/prop-types.ts b/client/src/redux/prop-types.ts
index dc452cded8c..054b69b65cf 100644
--- a/client/src/redux/prop-types.ts
+++ b/client/src/redux/prop-types.ts
@@ -207,7 +207,7 @@ type InteractiveEditorNodule = {
 export type ChallengeNode = {
   challenge: {
     block: string;
-    blockLabel: BlockLabel;
+    blockLabel?: BlockLabel;
     blockLayout: BlockLayouts;
     certification: string;
     challengeOrder: number;
diff --git a/client/src/templates/Introduction/components/super-block-accordion.tsx b/client/src/templates/Introduction/components/super-block-accordion.tsx
index e1a21a9c8d4..376ab32f5fa 100644
--- a/client/src/templates/Introduction/components/super-block-accordion.tsx
+++ b/client/src/templates/Introduction/components/super-block-accordion.tsx
@@ -49,7 +49,7 @@ interface ModuleProps {
 interface Challenge {
   id: string;
   block: string;
-  blockLabel: BlockLabel;
+  blockLabel?: BlockLabel;
   title: string;
   fields: { slug: string };
   dashedName: string;
@@ -236,7 +236,7 @@ const LinkModule = ({
     <li className='link-block'>
       <Block
         block={challenges[0].block}
-        blockLabel={label}
+        blockLabel={label || null}
         challenges={challenges}
         superBlock={superBlock}
         accordion={accordion}
diff --git a/client/src/templates/Introduction/components/super-block-map.tsx b/client/src/templates/Introduction/components/super-block-map.tsx
index 9355a975d68..162c4404a5f 100644
--- a/client/src/templates/Introduction/components/super-block-map.tsx
+++ b/client/src/templates/Introduction/components/super-block-map.tsx
@@ -32,7 +32,7 @@ import './super-block-accordion.css';
 
 type Challenge = {
   block: string;
-  blockLabel: BlockLabel;
+  blockLabel?: BlockLabel;
   blockLayout: BlockLayouts;
   challengeType: number;
   dashedName: string;
diff --git a/client/src/templates/Introduction/super-block-intro.test.tsx b/client/src/templates/Introduction/super-block-intro.test.tsx
index de25daed721..87b7b7c4fea 100644
--- a/client/src/templates/Introduction/super-block-intro.test.tsx
+++ b/client/src/templates/Introduction/super-block-intro.test.tsx
@@ -156,7 +156,7 @@ type ChallengeNode = {
     id: string;
     fields: { slug: string; blockName: string };
     block: string;
-    blockLabel: BlockLabel;
+    blockLabel?: BlockLabel;
     challengeType: number;
     title: string;
     order: number;
diff --git a/client/src/templates/Introduction/super-block-intro.tsx b/client/src/templates/Introduction/super-block-intro.tsx
index 6b28bfcb550..505e002cccb 100644
--- a/client/src/templates/Introduction/super-block-intro.tsx
+++ b/client/src/templates/Introduction/super-block-intro.tsx
@@ -58,7 +58,7 @@ type ChallengeNode = {
     fields: { slug: string };
     id: string;
     block: string;
-    blockLabel: BlockLabel;
+    blockLabel?: BlockLabel;
     challengeType: number;
     title: string;
     order: number;
diff --git a/curriculum/schema/challenge-schema.js b/curriculum/schema/challenge-schema.js
index 101f4c46363..40cf121cc4d 100644
--- a/curriculum/schema/challenge-schema.js
+++ b/curriculum/schema/challenge-schema.js
@@ -145,7 +145,7 @@ const schema = Joi.object().keys({
       'learn',
       'practice'
     ).required(),
-    otherwise: Joi.valid(null)
+    otherwise: Joi.optional()
   }),
   blockLayout: Joi.valid(
     'challenge-list',
diff --git a/curriculum/src/file-handler.ts b/curriculum/src/file-handler.ts
index 97ba3b7cfb8..41711633cac 100644
--- a/curriculum/src/file-handler.ts
+++ b/curriculum/src/file-handler.ts
@@ -6,6 +6,7 @@ import { fileURLToPath } from 'node:url';
 import debug from 'debug';
 
 import type { Chapter } from '../../shared-dist/config/chapters.js';
+import type { BlockLabel } from '../../shared-dist/config/blocks.js';
 import type {
   SuperBlocks,
   ChallengeLang
@@ -169,7 +170,7 @@ export interface BlockStructure {
   disableLoopProtectTests?: boolean;
   disableLoopProtectPreview?: boolean;
   blockLayout: string;
-  blockLabel: string;
+  blockLabel?: BlockLabel;
   challengeOrder: Challenge[];
   dashedName: string;
   isUpcomingChange?: boolean;
diff --git a/tools/challenge-helper-scripts/helpers/project-metadata.ts b/tools/challenge-helper-scripts/helpers/project-metadata.ts
index 019bcae9269..ae3b66c5670 100644
--- a/tools/challenge-helper-scripts/helpers/project-metadata.ts
+++ b/tools/challenge-helper-scripts/helpers/project-metadata.ts
@@ -3,12 +3,13 @@ import {
   getBlockStructure,
   writeBlockStructure
 } from '../../../curriculum/src/file-handler.js';
+import type { BlockLabel } from '../../../shared-dist/config/blocks.js';
 import { getProjectPath } from './get-project-info.js';
 
 export type Meta = {
   name: string;
   blockLayout: string;
-  blockLabel: string;
+  blockLabel?: BlockLabel;
   isUpcomingChange: boolean;
   dashedName: string;
   helpCategory: string;