diff --git a/addons/stock/models/stock_move.py b/addons/stock/models/stock_move.py
index 4e2fe04f84f..12374a69e08 100644
--- a/addons/stock/models/stock_move.py
+++ b/addons/stock/models/stock_move.py
@@ -1094,7 +1094,7 @@ Please change the quantity done or the rounding precision of your unit of measur
             if breaking_char in (move_line.lot_name or ''):
                 split_lines = move_line.lot_name.split(breaking_char)
                 split_lines = list(filter(None, split_lines))
-                move_line.lot_name = split_lines[0]
+                move_line.lot_name = split_lines[0] if split_lines else ''
                 move_lines_commands = self._generate_serial_move_line_commands(
                     split_lines[1:],
                     origin_move_line=move_line,