Enter line ID for costs which must be capitalized

What causes this issue?

The total percentage you specified for costs with an option to
capitalize and costs which cannot be capitalized is less than 100. In
this case you must enter a <DS:GLOS.line_ID>line ID</> for costs which
must be capitalized.

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 either a line ID for cost which must be capitalized, or enter
line IDs for costs with an option to capitalize and/or costs which
cannot be capitalized, and assign percentages to these line IDs. The
percentages must add up to 100.

Error message extract from SAP system. Copyright SAP SE.