When modifying an order, it is mandatory to add an Order Modify Reason for e.g. Customer changed his mind, Double entry, Item unavailable, etc. To create Order Modify Reasons in Sapaad:

Step 1: Visit Setup > Global Settings > Order Modify Reasons.
Step 2: Click the Add Reason button, enter the reason and click Save.

Make sure to check out our related video: Creating Cancellation and Modification Reasons for Orders on Sapaad POS