Chris Green
--- a/src/Form/EnvironmentIndicatorSettingsForm.php
+++ b/src/Form/EnvironmentIndicatorSettingsForm.php
      '#title' => $this->t('Fallback source of version identifier to display'),
      '#description' => $this->t('Select the fallback source of the version identifier to display in the environment indicator.'),
      '#options' => $fallback_options,
-      '#default_value' => $config->get('version_identifier_fallback') ?: 'none',
+      '#config_target' => 'environment_indicator.settings:version_identifier_fallback
--- a/src/Form/EnvironmentIndicatorSettingsForm.php
+++ b/src/Form/EnvironmentIndicatorSettingsForm.php
      '#type' => 'select',
      '#title' => $this->t('Source of version identifier to display'),
      '#description' => $this->t('Select the source of the version identifier to display in the environment indicator.'),
-      '#options' => $version_identifier_options,
+      '#config_target' => 'environment_indicator.settings:version_identifier
      '#default_value' => $config->get('version_identifier') ?: 'deployment_identifier',
--- a/src/Form/EnvironmentIndicatorSettingsForm.php
+++ b/src/Form/EnvironmentIndicatorSettingsForm.php
      '#type' => 'select',
      '#title' => $this->t('Source of version identifier to display'),
      '#description' => $this->t('Select the source of the version identifier to display in the environment indicator.'),
-      '#options' => $version_identifier_options,
-      '#default_value' => $config->get('version_identifier') ?: 'deployment_identifier',
+      '#config_target' => 'environment_indicator.settings:version_identifier