diff --git a/docs/sev1_median_duration.geojson b/docs/sev1_median_duration.geojson
index 9cf55cf..3a12b39 100644
--- a/docs/sev1_median_duration.geojson
+++ b/docs/sev1_median_duration.geojson
@@ -1 +1 @@
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diff --git a/docs/sev2_median_duration.geojson b/docs/sev2_median_duration.geojson
index 4fd7fa6..834baae 100644
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diff --git a/docs/sev3_median_duration.geojson b/docs/sev3_median_duration.geojson
index e733a86..04f105c 100644
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\ No newline at end of file
diff --git a/process.py b/process.py
index f4cf1c5..0ad4165 100644
--- a/process.py
+++ b/process.py
@@ -141,7 +141,11 @@ def format_quote(raw_note: str) -> str:
         duration = datetime.fromisoformat(
             feat.properties["CreationDate"]
         ) - datetime.fromisoformat(feat.properties["when_did_you_lose_water"])
-        if feat.properties["when_did_you_regain_water"]:
+        if (
+            feat.properties["when_did_you_regain_water"]
+            and feat.properties["when_did_you_regain_water"]
+            < feat.properties["CreationDate"]
+        ):
             duration = datetime.fromisoformat(
                 feat.properties["when_did_you_regain_water"]
             ) - datetime.fromisoformat(feat.properties["when_did_you_lose_water"])