Enter characteristic without leaving gaps

What causes this issue?

You can define characteristic values in this window. Generic entry is
also possible. At least one characteristic value must be defined,
depending on the planning type (if several characteristic values are to
be planned, use planning variant 1 according to table T444U) or an
initial characteristic must remain (in all other cases, use planning
variants 2 and 3 according to table T444U). With generic entry, the
characteristic values must be entered without a gap up to the last
defined field.

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?

Enter the characteristic values as described.

Error message extract from SAP system. Copyright SAP SE.