diff --git a/kowalski/alert_brokers/alert_broker.py b/kowalski/alert_brokers/alert_broker.py
index a9b94cfc..c64b8a8a 100644
--- a/kowalski/alert_brokers/alert_broker.py
+++ b/kowalski/alert_brokers/alert_broker.py
@@ -1802,37 +1802,6 @@ def alert_sentinel_skyportal(self, alert, prv_candidates, passed_filters):
             # post alert photometry in single call to /api/photometry
             alert["prv_candidates"] = prv_candidates
 
-            # also get all the alerts for this object, to make sure to have all the detections
-            try:
-                all_alerts = list(
-                    retry(self.mongo.db[self.collection_alerts].find)(
-                        {
-                            "objectId": alert["objectId"],
-                            "candid": {"$ne": alert["candid"]},
-                        },
-                        {
-                            "candidate": 1,
-                        },
-                    )
-                )
-                all_alerts = [
-                    {**a["candidate"]} for a in all_alerts if "candidate" in a
-                ]
-                # add to prv_candidates the detections that are not already in there
-                # use the jd and the fid to match
-                for a in all_alerts:
-                    if not any(
-                        [
-                            (a["jd"] == p["jd"]) and (a["fid"] == p["fid"])
-                            for p in alert["prv_candidates"]
-                        ]
-                    ):
-                        alert["prv_candidates"].append(a)
-                del all_alerts
-            except Exception as e:
-                # this should never happen, but just in case
-                log(f"Failed to get all alerts for {alert['objectId']}: {e}")
-
             self.alert_put_photometry(alert)
 
         if len(autosave_group_ids):
diff --git a/kowalski/utils.py b/kowalski/utils.py
index 221dde12..740864d5 100644
--- a/kowalski/utils.py
+++ b/kowalski/utils.py
@@ -1193,7 +1193,7 @@ def __init__(self, alert, alert_history, models, label=None, **kwargs):
             alert["candidate"].get("jdstarthist", None),
             min(
                 [alert["candidate"]["jd"]]
-                + [a["jd"] for a in alert_history if a["magpsf"] is not None]
+                + [a["jd"] for a in alert_history if a.get("magpsf", None) is not None]
             ),
         )