BR-CO-10: The header sum of invoice line net amounts (BT-106) does not equal the actual…
What it means
The header sum of invoice line net amounts (BT-106) does not equal the actual sum of the individual line net amounts (BT-131).
How to fix it
Recalculate BT-106 as the exact sum of all line net amounts and re-issue. Arithmetic mismatch -- reported expected-vs-found, never auto-repaired.