diff --git a/lib/shared/dm-ops/delete-entry-spec.js b/lib/shared/dm-ops/delete-entry-spec.js
--- a/lib/shared/dm-ops/delete-entry-spec.js
+++ b/lib/shared/dm-ops/delete-entry-spec.js
@@ -1,5 +1,6 @@
 // @flow
 
+import invariant from 'invariant';
 import uuid from 'uuid';
 
 import type {
@@ -7,7 +8,6 @@
   ProcessDMOperationUtilities,
 } from './dm-op-spec.js';
 import type { DMDeleteEntryOperation } from '../../types/dm-ops.js';
-import type { ThickRawEntryInfo } from '../../types/entry-types.js';
 import { messageTypes } from '../../types/message-types-enum.js';
 import { updateTypes } from '../../types/update-types-enum.js';
 import type { EntryUpdateInfo } from '../../types/update-types.js';
@@ -33,7 +33,11 @@
     const messageData = createMessageDataFromDMOperation(dmOperation);
     return { messageDatas: [messageData] };
   },
-  processDMOperation: async (dmOperation: DMDeleteEntryOperation) => {
+  processDMOperation: async (
+    dmOperation: DMDeleteEntryOperation,
+    viewerID: string,
+    utilities: ProcessDMOperationUtilities,
+  ) => {
     const {
       threadID,
       creatorID,
@@ -45,13 +49,24 @@
       messageID,
     } = dmOperation;
 
+    const rawEntryInfo = utilities.entryInfos[entryID];
     const messageData = createMessageDataFromDMOperation(dmOperation);
     const rawMessageInfos = [
       rawMessageInfoFromMessageData(messageData, messageID),
     ];
 
+    invariant(rawEntryInfo?.thick, 'Entry thread should be thick');
+    const timestamp = rawEntryInfo.lastUpdatedTime;
+
+    if (timestamp > time) {
+      return {
+        rawMessageInfos,
+        updateInfos: [],
+      };
+    }
+
     const date = dateFromString(dateString);
-    const rawEntryInfo: ThickRawEntryInfo = {
+    const rawEntryInfoToUpdate = {
       id: entryID,
       threadID,
       text: prevText,
@@ -66,7 +81,7 @@
     };
 
     const entryUpdateInfo: EntryUpdateInfo = {
-      entryInfo: rawEntryInfo,
+      entryInfo: rawEntryInfoToUpdate,
       type: updateTypes.UPDATE_ENTRY,
       id: uuid.v4(),
       time,