diff --git a/ghost/admin/package.json b/ghost/admin/package.json
index a91881f0c8..c0c86bb9db 100644
--- a/ghost/admin/package.json
+++ b/ghost/admin/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ghost-admin",
-  "version": "5.52.1",
+  "version": "5.52.2",
   "description": "Ember.js admin client for Ghost",
   "author": "Ghost Foundation",
   "homepage": "http://ghost.org",
diff --git a/ghost/core/core/server/models/post.js b/ghost/core/core/server/models/post.js
index 4178d8abd9..e09a325b41 100644
--- a/ghost/core/core/server/models/post.js
+++ b/ghost/core/core/server/models/post.js
@@ -875,7 +875,11 @@ Post = ghostBookshelf.Model.extend({
                     revision_interval_ms: POST_REVISIONS_INTERVAL_MS
                 }
             });
-            const authorId = this.contextUser(options);
+            let authorId = this.contextUser(options);
+            const authorExists = await ghostBookshelf.model('User').findOne({id: authorId}, {transacting: options.transacting});
+            if (!authorExists) {
+                authorId = await ghostBookshelf.model('User').getOwnerUser().get('id');
+            }
             ops.push(async function updateRevisions() {
                 const revisionModels = await ghostBookshelf.model('PostRevision')
                     .findAll(Object.assign({
diff --git a/ghost/core/package.json b/ghost/core/package.json
index 2befe19c53..a625d077f5 100644
--- a/ghost/core/package.json
+++ b/ghost/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ghost",
-  "version": "5.52.1",
+  "version": "5.52.2",
   "description": "The professional publishing platform",
   "author": "Ghost Foundation",
   "homepage": "https://ghost.org",