diff --git a/paramecio/cromosoma/querybuilder.py b/paramecio/cromosoma/querybuilder.py
index 87ceab0..bde9c3c 100644
--- a/paramecio/cromosoma/querybuilder.py
+++ b/paramecio/cromosoma/querybuilder.py
@@ -25,7 +25,10 @@ def insert(model, dict_values, external_agent=True):
     query_error=False
     last_sql=''
     
-    model.fields[model.name_field_id].required=False
+    #model.fields[model.name_field_id].required=False
+    
+    if model.name_field_id in dict_values:
+        del dict_values[model.name_field_id]
     
     try:
         
diff --git a/paramecio/cromosoma/webmodel.py b/paramecio/cromosoma/webmodel.py
index 5d851eb..19e7c57 100644
--- a/paramecio/cromosoma/webmodel.py
+++ b/paramecio/cromosoma/webmodel.py
@@ -272,10 +272,14 @@ class WebModel:
         
         self.name_field_id=name_field_id
         
-        #Fields of the table, inserte with register method
+        #Fields of the table, inserted with register method
         
         self.fields=OrderedDict()
         
+        # Errors of fields of the table, for safe thread reasons.
+        
+        self.fields_error=OrderedDict()        
+        
         #The tables related with foreignkeyfield to this table
         
         self.related=[]