diff --git a/db.json b/db.json
index 1fa0494..e9b1817 100644
--- a/db.json
+++ b/db.json
@@ -1 +1 @@
-{"_default": {"1": {"Serial Number": "123", "Brand": "d", "Grade": "7", "Name": "jb"}, "2": {"Serial Number": "1", "Brand": "2", "Grade": "3", "Name": "4"}}}
\ No newline at end of file
+{"_default": {}}
\ No newline at end of file
diff --git a/main.py b/main.py
index e52e240..ad11387 100644
--- a/main.py
+++ b/main.py
@@ -122,7 +122,7 @@ def main():
             )
             window["table"].update(format_table(result))
 
-        elif event == "table":
+        elif event == "table" and values["table"]:
             row=window["table"].get()[values["table"][0]]
             window["Serial Number"].update(row[0])
             window["Brand"].update(row[1])