Condition type & does not exist in calculation procedure &

What causes this issue?

The calculation procedure you have entered does not exist in the
system.

System Response

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

How to fix this error?

Choose an existing calculation procedure or define the missing
calculation procedure in Customizing.

Procedure for System Administrators

You define a missing calculation procedure in Customizing for
<ZH>Financial Accounting</> under <ZH>Financial Accounting Global
Settings -> Tax on Sales/Purchases -> Basic Settings -> Check
calculation procedure</>.

Error message extract from SAP system. Copyright SAP SE.