Replace _parent_ expression with direct field on sale and purchase line
Since #12003 (closed) lines can be edited outside the parent form so expression should not rely on parent.
Closes #12109 (closed)
All legacy (hg-git based) Projects have been automatically migrated to native with the upgrade of 2025-01-23
Since #12003 (closed) lines can be edited outside the parent form so expression should not rely on parent.
Closes #12109 (closed)