Ariel Barreiro
--- a/src/Plugin/migrate/destination/EntityReferenceRevisions.php
+++ b/src/Plugin/migrate/destination/EntityReferenceRevisions.php
        }
      }
    }
  }
-  protected function rollbackTranslation(array $destination_identifiers) {
-    $revision_id = $destination_identifiers['revision_id'];
-    $entity = $this->storage->loadRevision($revision_id);
-    if ($entity && $entity instanceof TranslatableInterface) {
-      if ($key = $this->getKey('langcode')) {
-        if (isset($destination_identifiers[$key])) {
-          $langcode = $destination_identifiers[$key];
-          if ($entity->hasTranslation($langcode)) {
-            // Make sure we don't remove the default translation.
-            $translation = $entity->getTranslation($langcode);
-            if (!$translation->isDefaultTranslation()) {
-              $entity->removeTranslation($langcode);
-              $entity->save();
-            }
-          }
-        }
-      }
-    }
-  }
+  protected function rollbackTranslation(array $destination_identifiers) {
+    if ($revision_id = $this->getKey('revision')) {
+      $entity = $this->storage->loadRevision($revision_id);
+      if ($entity && $entity instanceof TranslatableInterface) {
+        if ($key = $this->getKey('langcode')) {
+          if (isset($destination_identifiers[$key])) {
+            $langcode = $destination_identifiers[$key];
+            if ($entity->hasTranslation($langcode)) {
+              // Make sure we don't remove the default translation.
+              $translation = $entity->getTranslation($langcode);
+              if (!$translation->isDefaultTranslation()) {
+                $entity->removeTranslation($langcode);
+                $entity->save();
+              }
+            }
+          }
+        }
+      }
+    }
+  }
--- a/src/Plugin/migrate/destination/EntityReferenceRevisions.php
+++ b/src/Plugin/migrate/destination/EntityReferenceRevisions.php
    }
  }

 }
-  protected function rollbackNonTranslation(array $destination_identifiers) {
-    $revision_id = $destination_identifiers['revision_id'];
-    $entity = $this->storage->loadRevision($revision_id);
-    if ($entity) {
-      if ($entity->isDefaultRevision()) {
-        $entity->delete();
-      }
-      else {
-        $this->storage->deleteRevision($revision_id);
-      }
-    }
-  }
-
-}
+  protected function rollbackNonTranslation(array $destination_identifiers) {
+    if ($revision_id = $this->getKey('revision')) {
+      $entity = $this->storage->loadRevision($revision_id);
+      if ($entity) {
+        if ($entity->isDefaultRevision()) {
+          $entity->delete();
+        }
+        else {
+          $this->storage->deleteRevision($revision_id);
+        }
+      }
+    }
+  }
+}