diff --git a/modules/oe_content_timeline_field/oe_content_timeline_field.install b/modules/oe_content_timeline_field/oe_content_timeline_field.install
index e6c583e9e..77a059909 100644
--- a/modules/oe_content_timeline_field/oe_content_timeline_field.install
+++ b/modules/oe_content_timeline_field/oe_content_timeline_field.install
@@ -7,6 +7,8 @@
 
 declare(strict_types = 1);
 
+use Drupal\Core\Entity\FieldableEntityInterface;
+
 /**
  * Change timeline "label" column type from "varchar_ascii" to "varchar".
  */
@@ -17,9 +19,18 @@ function oe_content_timeline_field_update_8101(): void {
   $key_value = \Drupal::keyValue('entity.storage_schema.sql');
   $db = \Drupal::database();
 
-  $timeline_fields = $entity_field_manager->getFieldMapByFieldType('timeline_field');
-  foreach ($timeline_fields as $entity_type => $fields) {
-    foreach (array_keys($fields) as $field_name) {
+  // Iterate through all fields with type 'timeline_field'.
+  // Previously this was done with
+  //   $timeline_fields = $entity_field_manager->getFieldMapByFieldType('timeline_field');
+  // Unfortunately, this misses field storages with no instances.
+  foreach (\Drupal::entityTypeManager()->getDefinitions() as $entity_type => $entity_type_definition) {
+    if (!$entity_type_definition->entityClassImplements(FieldableEntityInterface::class)) {
+      continue;
+    }
+    foreach ($entity_field_manager->getFieldStorageDefinitions($entity_type) as $field_name => $field_storage_definition) {
+      if ($field_storage_definition->getType() !== 'timeline_field') {
+        continue;
+      }
       $key_name = $entity_type . '.field_schema_data.' . $field_name;
       $storage_schema = $key_value->get($key_name);
       $schema_field = $field_name . '_label';