diff --git a/protos/Backups.proto b/protos/Backups.proto
index f9e70a08f0f..f2ca9e719e0 100644
--- a/protos/Backups.proto
+++ b/protos/Backups.proto
@@ -751,6 +751,7 @@ message SimpleChatUpdate {
     PAYMENTS_ACTIVATED = 10;
     PAYMENT_ACTIVATION_REQUEST = 11;
     UNSUPPORTED_PROTOCOL_MESSAGE = 12;
+    REPORTED_SPAM = 13;
   }
 
   Type type = 1;
@@ -1042,7 +1043,7 @@ message ChatStyle {
   }
 
   message CustomChatColor {
-    uint32 id = 1;
+    uint64 id = 1;
 
     oneof color {
       fixed32 solid = 2;
@@ -1116,7 +1117,7 @@ message ChatStyle {
     BubbleColorPreset bubbleColorPreset = 4;
 
     // See AccountSettings.customChatColors
-    uint32 customColorId = 5;
+    uint64 customColorId = 5;
   }
 
   bool dimWallpaperInDarkMode = 7;
diff --git a/ts/services/backups/export.ts b/ts/services/backups/export.ts
index 14d6493ec2e..aa8e4ae5364 100644
--- a/ts/services/backups/export.ts
+++ b/ts/services/backups/export.ts
@@ -27,6 +27,7 @@ import {
 import type { RawBodyRange } from '../../types/BodyRange';
 import { LONG_ATTACHMENT_LIMIT } from '../../types/Message';
 import { PaymentEventKind } from '../../types/Payment';
+import { MessageRequestResponseEvent } from '../../types/MessageRequestResponseEvent';
 import type {
   ConversationAttributesType,
   MessageAttributesType,
@@ -78,6 +79,7 @@ import {
   isChangeNumberNotification,
   isJoinedSignalNotification,
   isTitleTransitionNotification,
+  isMessageRequestResponse,
 } from '../../state/selectors/message';
 import * as Bytes from '../../Bytes';
 import { canBeSynced as canPreferredReactionEmojiBeSynced } from '../../reactions/preferredReactionEmoji';
@@ -181,7 +183,7 @@ export class BackupExportStream extends Readable {
 
   // Map from custom color uuid to an index in accountSettings.customColors
   // array.
-  private customColorIdByUuid = new Map<string, number>();
+  private customColorIdByUuid = new Map<string, Long>();
 
   public run(backupLevel: BackupLevel): void {
     drop(
@@ -1328,6 +1330,31 @@ export class BackupExportStream extends Readable {
       return { kind: NonBubbleResultKind.Directionless, patch };
     }
 
+    if (isMessageRequestResponse(message)) {
+      const { messageRequestResponseEvent: event } = message;
+      if (event == null) {
+        return { kind: NonBubbleResultKind.Drop };
+      }
+
+      let type: Backups.SimpleChatUpdate.Type;
+      const { Type } = Backups.SimpleChatUpdate;
+      switch (event) {
+        case MessageRequestResponseEvent.ACCEPT:
+        case MessageRequestResponseEvent.BLOCK:
+        case MessageRequestResponseEvent.UNBLOCK:
+          return { kind: NonBubbleResultKind.Drop };
+        case MessageRequestResponseEvent.SPAM:
+          type = Type.REPORTED_SPAM;
+          break;
+        default:
+          throw missingCaseError(event);
+      }
+
+      updateMessage.simpleUpdate = { type };
+
+      return { kind: NonBubbleResultKind.Directionless, patch };
+    }
+
     if (isDeliveryIssue(message)) {
       updateMessage.simpleUpdate = {
         type: Backups.SimpleChatUpdate.Type.BAD_DECRYPT,
@@ -2278,7 +2305,7 @@ export class BackupExportStream extends Readable {
 
     const result = new Array<Backups.ChatStyle.ICustomChatColor>();
     for (const [uuid, color] of Object.entries(customColors.colors)) {
-      const id = result.length;
+      const id = Long.fromNumber(result.length);
       this.customColorIdByUuid.set(uuid, id);
 
       const start = hslToRGBInt(color.start.hue, color.start.saturation);
diff --git a/ts/services/backups/import.ts b/ts/services/backups/import.ts
index f0b6522b78e..eb73833222c 100644
--- a/ts/services/backups/import.ts
+++ b/ts/services/backups/import.ts
@@ -23,6 +23,7 @@ import {
 import { isStoryDistributionId } from '../../types/StoryDistributionId';
 import * as Errors from '../../types/errors';
 import { PaymentEventKind } from '../../types/Payment';
+import { MessageRequestResponseEvent } from '../../types/MessageRequestResponseEvent';
 import {
   ContactFormType,
   AddressType as ContactAddressType,
@@ -2450,6 +2451,7 @@ export class BackupImportStream extends Writable {
     }
   ): Promise<Partial<MessageAttributesType> | undefined> {
     const { Type } = Backups.SimpleChatUpdate;
+    strictAssert(simpleUpdate.type != null, 'Simple update missing type');
     switch (simpleUpdate.type) {
       case Type.END_SESSION:
         return {
@@ -2493,7 +2495,6 @@ export class BackupImportStream extends Writable {
       case Type.RELEASE_CHANNEL_DONATION_REQUEST:
         log.warn('backups: dropping boost request from release notes');
         return undefined;
-      // TODO(indutny): REPORTED_SPAM
       case Type.PAYMENTS_ACTIVATED:
         return {
           payment: {
@@ -2513,8 +2514,13 @@ export class BackupImportStream extends Writable {
           requiredProtocolVersion:
             SignalService.DataMessage.ProtocolVersion.CURRENT - 1,
         };
+      case Type.REPORTED_SPAM:
+        return {
+          type: 'message-request-response-event',
+          messageRequestResponseEvent: MessageRequestResponseEvent.SPAM,
+        };
       default:
-        throw new Error('Not implemented');
+        throw new Error(`Unsupported update type: ${simpleUpdate.type}`);
     }
   }
 
@@ -2583,7 +2589,7 @@ export class BackupImportStream extends Writable {
       }
 
       customColors.colors[uuid] = value;
-      this.customColorById.set(color.id || 0, {
+      this.customColorById.set(color.id?.toNumber() || 0, {
         id: uuid,
         value,
       });
@@ -2703,7 +2709,9 @@ export class BackupImportStream extends Writable {
     } else {
       strictAssert(chatStyle.customColorId != null, 'Missing custom color id');
 
-      const entry = this.customColorById.get(chatStyle.customColorId);
+      const entry = this.customColorById.get(
+        chatStyle.customColorId.toNumber()
+      );
       strictAssert(entry != null, 'Missing custom color');
 
       color = 'custom';
diff --git a/ts/state/selectors/message.ts b/ts/state/selectors/message.ts
index d2b69cef8f3..a26473437fd 100644
--- a/ts/state/selectors/message.ts
+++ b/ts/state/selectors/message.ts
@@ -1022,7 +1022,8 @@ export function isNormalBubble(message: MessageWithUIFieldsType): boolean {
     !isVerifiedChange(message) &&
     !isChangeNumberNotification(message) &&
     !isJoinedSignalNotification(message) &&
-    !isDeliveryIssue(message)
+    !isDeliveryIssue(message) &&
+    !isMessageRequestResponse(message)
   );
 }
 
diff --git a/ts/test-electron/backup/non_bubble_test.ts b/ts/test-electron/backup/non_bubble_test.ts
index 45ccbeda4f7..5242be2f4a7 100644
--- a/ts/test-electron/backup/non_bubble_test.ts
+++ b/ts/test-electron/backup/non_bubble_test.ts
@@ -13,6 +13,7 @@ import { DataWriter } from '../../sql/Client';
 import { generateAci } from '../../types/ServiceId';
 import { PaymentEventKind } from '../../types/Payment';
 import { ContactFormType } from '../../types/EmbeddedContact';
+import { MessageRequestResponseEvent } from '../../types/MessageRequestResponseEvent';
 import { DurationInSeconds } from '../../util/durations';
 import { ReadStatus } from '../../messages/MessageReadStatus';
 import { SeenStatus } from '../../MessageSeenStatus';
@@ -542,4 +543,20 @@ describe('backup/non-bubble messages', () => {
       ]
     );
   });
+
+  it('roundtrips spam report message', async () => {
+    await symmetricRoundtripHarness([
+      {
+        conversationId: contactA.id,
+        id: generateGuid(),
+        type: 'message-request-response-event',
+        received_at: 1,
+        sourceServiceId: CONTACT_A,
+        sourceDevice: 1,
+        sent_at: 1,
+        timestamp: 1,
+        messageRequestResponseEvent: MessageRequestResponseEvent.SPAM,
+      },
+    ]);
+  });
 });