diff --git a/gui/src/aaregui/panels/manual_sample_panel.py b/gui/src/aaregui/panels/manual_sample_panel.py
index 8219add6..5dce6884 100644
--- a/gui/src/aaregui/panels/manual_sample_panel.py
+++ b/gui/src/aaregui/panels/manual_sample_panel.py
@@ -112,7 +112,7 @@ class ManualSamplePanel(QWidget):
             puck_name="",
             dewar_name="",
             sample_name=self.__sample_name,
-            run_number=-1,
+            run_number=1, #can't be -1. So have defaulted to 1 for now.
             pin=1,
             aaredb_params=data_processing,
             user=self.__pgroup,