Fixed a typo in the expression

tripal_chado/includes/tripal_chado.fields.inc

@@ -464,7 +464,8 @@ function tripal_chado_bundle_fields_info_custom(&$info, $details, $entity_type,
   }
 
   // Protocol.
-  if ($table_name == 'protocol' and array_key_exists('protocol_id', $schema['fields'])) {
+  if ($table_name != 'protocol' and 
+      array_key_exists('protocol_id', $schema['fields'])) {
     $field_name = 'sep__protocol';
     $field_type = 'sep__protocol';
     $info[$field_name] = array(