The graph view of product margins cannot be displayed because it raises
an error
Steps to reproduce:
1. Install Accounting
2. Go to settings and enable Margin Analysis
3. Go to Accounting > Reporting > Management > Product Margins
4. Go to the graph view
5. A User Error is thrown
Solution:
Remove the `:sum` operators for non-stored fields in read_group
Problem:
The graph view tries to sum up the total_margin with `total_margin:sum`
but as the field is not stored, it is not possible to compute it and it
raises the error
opw-2738456
closesodoo/odoo#92719
X-original-commit: fbaedeb18e49e5ed055c597cab33061153aaf1da
Signed-off-by: Guillaume Merlin (megu) <megu@odoo.com>
MerlinGuillaume
e7e15aafef