Costing variant & is missing in Table TCK03

What causes this issue?

The entry for costing variant &V1& in table TCK03 is necessary to
determine the costing type for the detailed planning. This entry is
missing, and you cannot carry out detailed planning
without this entry.

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?

Please inform your system administrator if you want to use detailed
planning.

Error message extract from SAP system. Copyright SAP SE.