code: def clean(self, value):
          
          if not self.create:
              # No new value can be created, use the regular clean field
              return super(AgnocompleteModelMultipleField, self).clean(value)
  
          # We have to do this here before the call to "super".
          # It'll be called again, but we can't find a way to "pre_clean" the
          # field value before pushing it into the parent class "clean()" method.
          value = self.clear_list_value(value)
          # Split the actual values with the potential new values
          # Numeric values will always be considered as PKs
          pks = [v for v in value if v.isdigit()]
          self._new_values = [v for v in value if not v.isdigit()]
  
          qs = super(AgnocompleteModelMultipleField, self).clean(pks)
  
          return qs
docs: Clean the field values.