diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index b9ccfb5..78c5088 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -8,7 +8,7 @@ jobs:
     name: PHPUnit Coverage Tests
     runs-on: ubuntu-latest
     container:
-      image: pookmish/drupal8ci:latest
+      image: pookmish/drupal8ci:php8.3
     services:
       mysql:
         image: mysql:8.0
@@ -77,7 +77,7 @@ jobs:
 #      DRUPAL_DATABASE_PASSWORD: drupal
 #      DRUPAL_DATABASE_HOST: mysql
 #    container:
-#      image: pookmish/drupal8ci:latest
+#      image: pookmish/drupal8ci:php8.3
 #      options: '--network-alias drupal8ci'
 #    services:
 #      mysql:
@@ -113,7 +113,7 @@ jobs:
 #      DRUPAL_DATABASE_PASSWORD: drupal
 #      DRUPAL_DATABASE_HOST: mysql
 #    container:
-#      image: pookmish/drupal8ci:latest
+#      image: pookmish/drupal8ci:php8.3
 #      options: '--network-alias=drupal8ci'
 #    services:
 #      selenium:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e55f763..1a7d30a 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Stanford Migrate
 
+8.6.5
+--------------------------------------------------------------------------------
+_Release Date: 2024-09-11_
+
+- Mark readonly fields for migrated fields with delta values.
+
 8.6.4
 --------------------------------------------------------------------------------
 _Release Date: 2024-08-08_
diff --git a/stanford_migrate.info.yml b/stanford_migrate.info.yml
index 09b1b91..995742e 100755
--- a/stanford_migrate.info.yml
+++ b/stanford_migrate.info.yml
@@ -3,7 +3,7 @@ description: 'Adds more functionality to migrate and migrate plus modules'
 type: module
 core_version_requirement: ^10.3 || ^11
 package: 'Stanford'
-version: 8.6.4
+version: 8.6.5
 dependencies:
   - drupal:migrate
   - empty_fields:empty_fields
diff --git a/stanford_migrate.module b/stanford_migrate.module
index f9ae4b7..c2f7588 100755
--- a/stanford_migrate.module
+++ b/stanford_migrate.module
@@ -87,7 +87,6 @@ function stanford_migrate_entity_form_display_alter(EntityFormDisplayInterface $
 
   $field_definitions = $form_display->get('fieldDefinitions');
   foreach ($form_display->getComponents() as $field_name => $component) {
-
     // Make sure the field component is one of the field definitions.
     if (empty($field_definitions[$field_name])) {
       continue;
@@ -97,12 +96,12 @@ function stanford_migrate_entity_form_display_alter(EntityFormDisplayInterface $
     // fields that are mapped from migration as readonly.
     $field_definition = $field_definitions[$field_name];
     $columns = $field_definition->getFieldStorageDefinition()->getColumns();
-    $processing = !empty($migration->process[$field_name]);
+    $processing = !empty($migration->process[$field_name]) || !empty($migration->process["$field_name/0"]);
 
     // This will check if a migrate process is mapped to a specific column on
     // the field.
     foreach (array_keys($columns) as $column) {
-      $processing = $processing ?: !empty($migration->process["$field_name/$column"]);
+      $processing = $processing ?: !empty($migration->process["$field_name/$column"]) || !empty($migration->process["$field_name/0/$column"]);
     }
 
     // If the migration destination has the `overwrite_properties` configured,