diff --git a/core/server/api/v2/utils/serializers/output/utils/clean.js b/core/server/api/v2/utils/serializers/output/utils/clean.js
index f4041f8d66..a10df51fc4 100644
--- a/core/server/api/v2/utils/serializers/output/utils/clean.js
+++ b/core/server/api/v2/utils/serializers/output/utils/clean.js
@@ -1,25 +1,28 @@
 const _ = require('lodash');
 const localUtils = require('../../../index');
 
-const tag = (attrs) => {
+const tag = (attrs, frame) => {
+    if (localUtils.isContentAPI(frame)) {
+        delete attrs.created_at;
+        delete attrs.updated_at;
+
+        // We are standardising on returning null from the Content API for any empty values
+        if (attrs.meta_title === '') {
+            attrs.meta_title = null;
+        }
+        if (attrs.meta_description === '') {
+            attrs.meta_description = null;
+        }
+        if (attrs.description === '') {
+            attrs.description = null;
+        }
+    }
+
     // Already deleted in model.toJSON, but leaving here so that we can clean that up when we deprecate v0.1
     delete attrs.parent_id;
 
     // Extra properties removed from v2
     delete attrs.parent;
-    delete attrs.created_at;
-    delete attrs.updated_at;
-
-    // We are standardising on returning null from the Content API for any empty values
-    if (attrs.meta_title === '') {
-        attrs.meta_title = null;
-    }
-    if (attrs.meta_description === '') {
-        attrs.meta_description = null;
-    }
-    if (attrs.description === '') {
-        attrs.description = null;
-    }
 
     return attrs;
 };
diff --git a/core/server/api/v2/utils/serializers/output/utils/mapper.js b/core/server/api/v2/utils/serializers/output/utils/mapper.js
index 995c569528..065650d1d4 100644
--- a/core/server/api/v2/utils/serializers/output/utils/mapper.js
+++ b/core/server/api/v2/utils/serializers/output/utils/mapper.js
@@ -21,10 +21,7 @@ const mapTag = (model, frame) => {
     const jsonModel = model.toJSON ? model.toJSON(frame.options) : model;
 
     url.forTag(model.id, jsonModel);
-
-    if (utils.isContentAPI(frame)) {
-        clean.tag(jsonModel);
-    }
+    clean.tag(jsonModel, frame);
 
     return jsonModel;
 };
diff --git a/core/test/acceptance/old/admin/utils.js b/core/test/acceptance/old/admin/utils.js
index 455b5c9ab5..1a9128aeae 100644
--- a/core/test/acceptance/old/admin/utils.js
+++ b/core/test/acceptance/old/admin/utils.js
@@ -35,8 +35,8 @@ const expectedProperties = {
     ,
     tag: _(schema.tags)
         .keys()
-        // Tag API swaps parent_id to parent
-        .without('parent_id').concat('parent')
+        // unused field
+        .without('parent_id')
     ,
     setting: _(schema.settings)
         .keys()
diff --git a/core/test/regression/api/v2/admin/utils.js b/core/test/regression/api/v2/admin/utils.js
index cff21dd144..c8f3a8d828 100644
--- a/core/test/regression/api/v2/admin/utils.js
+++ b/core/test/regression/api/v2/admin/utils.js
@@ -32,8 +32,8 @@ const expectedProperties = {
     ,
     tag: _(schema.tags)
         .keys()
-        // Tag API swaps parent_id to parent
-        .without('parent_id').concat('parent')
+        // unused field
+        .without('parent_id')
     ,
     setting: _(schema.settings)
         .keys()