diff --git a/inspirehep/modules/workflows/mappings/v7/holdingpen/hep.json b/inspirehep/modules/workflows/mappings/v7/holdingpen/hep.json
index 916659aca7..2345ace684 100644
--- a/inspirehep/modules/workflows/mappings/v7/holdingpen/hep.json
+++ b/inspirehep/modules/workflows/mappings/v7/holdingpen/hep.json
@@ -18,6 +18,12 @@
                     "matches": {
                         "type": "object"
                     },
+                    "_error_msg":{
+                        "type": "text"
+                    },
+                    "_last_task_name": {
+                        "type": "text"
+                    },
                     "relevance_prediction": {
                         "properties": {
                             "decision": {