fix schema errors
diff --git a/plstackapi/core/models.py b/plstackapi/core/models.py
index 02648a6..4b59dea 100644
--- a/plstackapi/core/models.py
+++ b/plstackapi/core/models.py
@@ -101,9 +101,9 @@
 class Sliver(PlCoreBase):
     tenant_id = models.CharField(max_length=200, help_text="Keystone tenant id")
     instance_id = models.CharField(max_length=200, help_text="Nova instance id")    
-    name = models.CharField(max_length=200, "Sliver name")
-    flavor = models.CharField(max_length=200, "OS Flavor")
-    image = models.CharField(max_length=200, "Image Name")    
+    name = models.CharField(max_length=200, help_text="Sliver name")
+    flavor = models.CharField(max_length=200, help_text="OS Flavor")
+    image = models.CharField(max_length=200, help_text="Image Name")    
     slice = models.ForeignKey(Slice, related_name='slices')
     siteDeploymentNetwork = models.ForeignKey(SiteDeploymentNetwork)
     #node = models.ForeignKey(Node, related_name='node')