Fix laravel template

template.laravel/server/app/BaseModelVersioned.php

@@ -216,7 +216,7 @@ class BaseModelVersioned extends Model
 
     Cache::flush(static::class);
 
-    if (!$this->Id || $this->Id == -1) {
+    if (is_null($this->Id) || $this->Id == -1) {
       $next = $this->selectRaw('COALESCE(MAX("Id") + 1,0)')->from($this->table)->toSql();
       $attrs = $this->getAttributes();
       $attrs["Id"] = DB::raw("($next)");