ArticlesAC: Discarded Sales Invoice and Sales Credit Note are getting regenerated

1. Open any Sales Invoice or Sales Credit Note that is in "In Progress" status and has a Billing Document number on it
2. Click Discard
3. Enter a reason and click Discard
4. SIN/SCR is now discarded
5. Observe that the Billing Document Number from the Discarded SIN/SCR is removed
6. And a new SIN/SCR is now automatically generated for the same Billing Document

Use the return mappings and a checkbox to stop the automatic regeneration of the SIN/SCN after discarding it.

• Step 1 - Creating the Custom Checkbox to stop the regeneration of Sales Invoice/Sales Credit Note.

1. Go to Setup, and click on 'Object Manager'
2. In Object Manager search for Billing Document
3. Go to Fields and Relationships
4. Click New to create a new custom checkbox that we can use in the return Mappings 
5. Select Checkbox and Next
6. Choose a name such as 'Auto Create Sales Invoices or Credit Note'. And ensure that the default value checked is selected. Click Next
7. Add the visibility and the page layouts that you want for your Organization
8. Click Save and then check if it is present in Fields and Relationships. This checkbox can be used for both the Sales Invoices and Sales Credit Note

• Step 2 - Adding to Return Mappings

1. In the App launcher search for 'BD to SIN Mappings'
2. In the Sales Invoice to Billing Document Return Mappings, Click Add Mapping
3. Source Type will be Static, with the Source Description Set as False. And the Source Data as False
4. Target Type will be Field and for Target Field select the 'Auto Create Sales Invoice or Credit Notes'. Click Save
5. Repeat this step for BD to SCN Mappings if you want to enable it for the Return mappings for Sales Credit Note. These return mappings for the Checkbox will need to be done for both the SIN and SCN Mappings, however you can use the same checkbox field.

• Step 3 - Amending the Custom Setting

1. Go to Setup and in Quick Find search for 'Custom Settings'
2. Filter by ‘B’ to get the Billing Document to Sale invoice
3. Open the Billing Document to Sales Invoice and click Edit
4. Then paste the API name from the custom checkbox that was made to the Auto Create Invoice or Credit Field (To find the API name go to Object Manager > Billing Document > Fields & Relationships > Copy the Field Name/API name of the field 'Auto Create Sales Invoice or Credit Notes')
5. Click Save, and so auto creation of sales invoice or credit note is enabled, but if you were to discard the Sales invoice, it would no longer regenerate.