Steps to reproduce the bug:

-On an empty database, install the sale module
-Activate product variants : Sales > Settings > Check Products can have several attributes, defining variants (Example: size, color,...)
-Activate advanced pricelists : Sales > Settings > Check Advanced pricing based on formulas (discounts, margins, rounding)
-Activate the developer mode
-Go to the product.templates list : Sales > Products
-Go to the debug menu > Edit TreeView and add the price field in the view
-Search for a pricelist : Type the name of an existing pricelist, then go to the pricelists proposal,
open the list of proposed pricelists, and select the pricelist

Bug:

A traceback was raised.

opw:762663