diff --git a/src/course-home/data/api.js b/src/course-home/data/api.js
index f1f59060..5b9d8684 100644
--- a/src/course-home/data/api.js
+++ b/src/course-home/data/api.js
@@ -133,7 +133,7 @@ export function normalizeOutlineBlocks(courseId, blocks) {
         break;
 
       case 'sequential':
-        models.sequences[block.id] = {
+        models.sequences[block.hash_key] = {
           complete: block.complete,
           description: block.description,
           due: block.due,
@@ -148,6 +148,7 @@ export function normalizeOutlineBlocks(courseId, blocks) {
           // link to the MFE ourselves).
           showLink: !!block.legacy_web_url,
           title: block.display_name,
+          hash_key: block.hash_key,
         };
         break;
 
@@ -170,8 +171,15 @@ export function normalizeOutlineBlocks(courseId, blocks) {
   Object.values(models.sections).forEach(section => {
     if (Array.isArray(section.sequenceIds)) {
       section.sequenceIds.forEach(sequenceId => {
-        if (sequenceId in models.sequences) {
-          models.sequences[sequenceId].sectionId = section.id;
+        const modelSequenceIds = {};
+        Object.values(models.sequences).forEach(sequence => {
+          if (sequenceId === sequence.id) {
+            modelSequenceIds[sequenceId] = sequence.hash_key;
+          }
+        });
+        if (sequenceId in modelSequenceIds) {
+          const sequence = modelSequenceIds[sequenceId];
+          models.sequences.[sequence].sectionId = section.id;
         } else {
           logInfo(`Section ${section.id} has child block ${sequenceId}, but that block is not in the list of sequences.`);
         }