[Path] fixes duplicate step slugs

src/plugin/path/Entity/Step.php

@@ -122,7 +122,7 @@ class Step
     private $evaluated = false;
 
     /**
-     * @Gedmo\Slug(fields={"title"}, unique=false)
+     * @Gedmo\Slug(fields={"title"}, unique=false, updatable=false)
      * @ORM\Column(length=128)
      */
     private $slug;

src/plugin/path/Installation/Migrations/pdo_mysql/Version20210903090000.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Innova\PathBundle\Installation\Migrations\pdo_mysql;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated migration based on mapping information: modify it with caution.
+ *
+ * Generation date: 2021/09/03 09:00:00
+ */
+class Version20210903090000 extends AbstractMigration
+{
+    public function up(Schema $schema): void
+    {
+        $this->addSql('
+            UPDATE innova_step t1
+            INNER JOIN innova_step t2
+            SET t1.slug = CONCAT(t1.slug, "-", t1.id) 
+            WHERE t1.id < t2.id 
+              AND t1.slug = t2.slug
+              AND t1.path_id = t2.path_id
+        ');
+    }
+
+    public function down(Schema $schema): void
+    {
+    }
+}