diff --git a/protos/SignalService.proto b/protos/SignalService.proto
index 577ed77f43..9bc9c15529 100644
--- a/protos/SignalService.proto
+++ b/protos/SignalService.proto
@@ -498,14 +498,14 @@ message SyncMessage {
       BLOCKED       = 3;
       CONFIGURATION = 4;
       KEYS          = 5;
-      PNI_IDENTITY  = 6;
+      reserved /* PNI_IDENTITY */ 6;
     }
 
     optional Type type = 1;
   }
 
   message Keys {
-    optional bytes storageService = 1; // deprecated: this field will be removed in a future release.
+    reserved /* storageService */ 1; // deprecated: this field will be removed in a future release.
     optional bytes master = 2; // deprecated: this field will be removed in a future release.
     optional string accountEntropyPool = 3;
     optional bytes mediaRootBackupKey = 4;
diff --git a/ts/background.ts b/ts/background.ts
index 70c5586c58..7696e316ee 100644
--- a/ts/background.ts
+++ b/ts/background.ts
@@ -3276,7 +3276,6 @@ export async function startApp(): Promise<void> {
     ev.confirm();
 
     const { accountEntropyPool, masterKey, mediaRootBackupKey } = ev;
-    let { storageServiceKey } = ev;
 
     const prevMasterKeyBase64 = window.storage.get('masterKey');
     const prevMasterKey = prevMasterKeyBase64
@@ -3314,7 +3313,6 @@ export async function startApp(): Promise<void> {
         log.info('onKeysSync: updating masterKey');
       }
       // Override provided storageServiceKey because it is deprecated.
-      storageServiceKey = deriveStorageServiceKey(derivedMasterKey);
       await window.storage.put('masterKey', Bytes.toBase64(derivedMasterKey));
     }
 
@@ -3331,12 +3329,8 @@ export async function startApp(): Promise<void> {
       await window.storage.put('backupMediaRootKey', mediaRootBackupKey);
     }
 
-    if (storageServiceKey == null) {
-      log.warn('onKeysSync: deleting window.storageKey');
-      await window.storage.remove('storageKey');
-    }
-
-    if (storageServiceKey) {
+    if (derivedMasterKey != null) {
+      const storageServiceKey = deriveStorageServiceKey(derivedMasterKey);
       const storageServiceKeyBase64 = Bytes.toBase64(storageServiceKey);
       if (window.storage.get('storageKey') === storageServiceKeyBase64) {
         log.info(
diff --git a/ts/textsecure/MessageReceiver.ts b/ts/textsecure/MessageReceiver.ts
index dd6625f31d..ab37f09409 100644
--- a/ts/textsecure/MessageReceiver.ts
+++ b/ts/textsecure/MessageReceiver.ts
@@ -3363,15 +3363,8 @@ export default class MessageReceiver
 
     logUnexpectedUrgentValue(envelope, 'keySync');
 
-    if (!sync.storageService && !sync.master) {
-      return undefined;
-    }
-
     const ev = new KeysEvent(
       {
-        storageServiceKey: Bytes.isNotEmpty(sync.storageService)
-          ? sync.storageService
-          : undefined,
         masterKey: Bytes.isNotEmpty(sync.master) ? sync.master : undefined,
         accountEntropyPool: sync.accountEntropyPool || undefined,
         mediaRootBackupKey: Bytes.isNotEmpty(sync.mediaRootBackupKey)
diff --git a/ts/textsecure/messageReceiverEvents.ts b/ts/textsecure/messageReceiverEvents.ts
index fab175ff05..5f391343ce 100644
--- a/ts/textsecure/messageReceiverEvents.ts
+++ b/ts/textsecure/messageReceiverEvents.ts
@@ -389,30 +389,22 @@ export class FetchLatestEvent extends ConfirmableEvent {
 }
 
 export type KeysEventData = Readonly<{
-  storageServiceKey: Uint8Array | undefined;
   masterKey: Uint8Array | undefined;
   accountEntropyPool: string | undefined;
   mediaRootBackupKey: Uint8Array | undefined;
 }>;
 
 export class KeysEvent extends ConfirmableEvent {
-  public readonly storageServiceKey: Uint8Array | undefined;
   public readonly masterKey: Uint8Array | undefined;
   public readonly accountEntropyPool: string | undefined;
   public readonly mediaRootBackupKey: Uint8Array | undefined;
 
   constructor(
-    {
-      storageServiceKey,
-      masterKey,
-      accountEntropyPool,
-      mediaRootBackupKey,
-    }: KeysEventData,
+    { masterKey, accountEntropyPool, mediaRootBackupKey }: KeysEventData,
     confirm: ConfirmCallback
   ) {
     super('keys', confirm);
 
-    this.storageServiceKey = storageServiceKey;
     this.masterKey = masterKey;
     this.accountEntropyPool = accountEntropyPool;
     this.mediaRootBackupKey = mediaRootBackupKey;