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-rw-r--r--uploader/population/models.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/uploader/population/models.py b/uploader/population/models.py
index 6dcd85e..d78a821 100644
--- a/uploader/population/models.py
+++ b/uploader/population/models.py
@@ -61,7 +61,7 @@ def save_population(cursor: mdb.cursors.Cursor, population_details: dict) -> dic
         **population_details,
         "FamilyOrder": _families.get(
             population_details["Family"],
-            max(_families.values())+1)
+            max((0,) + tuple(_families.values()))+1)
     }
     cursor.execute(
         "INSERT INTO InbredSet("