Refactor and use state to not resave the options.

frontend_routing.module

@@ -23,9 +23,9 @@ function frontend_routing_form_node_form_alter(&$form, &$form_state) {
   }
 
   // Check if the alias matches for the pattern.
-  $keys = \Drupal::config('frontend_routing.settings')->get('keys') ?? [];
-  foreach ($keys as $key => $value) {
-    if (empty($value['entity_id']) && !empty($value['bundle'])) {
+  $types = \Drupal::state()->get('frontend_routing.settings_type') ?? [];
+  foreach ($types as $value) {
+    if (($value['generic']) && !empty($value['bundle'])) {
       if (!$node->isNew() && $node->bundle() === $value['bundle']) {
         $form['path']['#access'] = FALSE;
         $form['path_replace']['#weight'] = $form['path']['#weight'];

src/Form/SettingsForm.php

@@ -63,6 +63,7 @@ final class SettingsForm extends ConfigFormBase {
 
     $config = $this->config('frontend_routing.settings');
     $nodes = $this->state->get('frontend_routing.settings') ?? [];
+    $types = $this->state->get('frontend_routing.settings_type') ?? [];
 
     $keys = $config->get('keys') ?? [];
 
@@ -101,7 +102,7 @@ final class SettingsForm extends ConfigFormBase {
         '#type' => 'select',
         '#options' => $this->getNodeTypes(),
         '#required' => TRUE,
-        '#default_value' => !empty($keys[$key]['bundle']) ? $keys[$key]['bundle'] : NULL,
+        '#default_value' => !empty($types[$key]['bundle']) ? $types[$key]['bundle'] : NULL,
       ];
 
       $required = TRUE;
@@ -228,6 +229,7 @@ final class SettingsForm extends ConfigFormBase {
   public function submitForm(array &$form, FormStateInterface $form_state): void {
 
     $nodes = [];
+    $types = [];
     // Save data from the table.
     $keys = $this->config('frontend_routing.settings')->get('keys') ?? [];
 
@@ -257,16 +259,20 @@ final class SettingsForm extends ConfigFormBase {
     $table = $form_state->getValue('table');
     if (is_array($table)) {
       foreach ($table as $key => $value) {
-        $keys[$key]['bundle'] = $value['bundle'];
+        $types[$key]['bundle'] = $value['bundle'];
+        $types[$key]['generic'] = TRUE;
         if (!empty($value['entity_id'])) {
           $nodes[$key] = $value['entity_id'];
+          $types[$key]['generic'] = FALSE;
         }
+
       }
       $this->config('frontend_routing.settings')
         ->set('keys', $keys)->save();
     }
 
     $this->updateNodeAliasSetting($nodes);
+    $this->state->set('frontend_routing.settings_type', $types);
     parent::submitForm($form, $form_state);
 
   }