SD item category &1 and company code &2 selected for integration

What causes this issue?

In the Customizing under <LS>Financial Accounting (New) -> Accounts
Receivable and Accounts Payable -> Business Transactions -> Debit-Side
and Credit-Side Down Payment Chains -> Enhance Debit-Side and
Credit-Side Down Payment Chains -> Assign Chain Type to Item Category
for Sales Documents</> you have defined an entry for the company code
&V2& and item category &V1& of the sales order.
This means you have defined the integration of the sales order and the
debit-side down payment chain for this company code and item category.
When creating a sales order with this item category, the system
automatically creates a contract of a debit-side down payment chain.
The system does not allow you to create a contract of a debit-side down
payment chain for this using the maintenance transaction for down
payment chains (transaction /SAPPCE/DPCD01 - Debit-Side Down Payment
Chains).

System Response

The system does not allow you to create a contract with reference to
this sales order.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.