You can only copy the detail planning if certain conditions are fulfilled

What causes this issue?

The detail plannings can only be copied if the following conditions are
fulfilled:
Reference and target fiscal year must be the same
All periods must be copied, that is, you cannot restrict the selection
to individual periods.
Exchange rate type and value date of the reference and target version
must be identical.
The copying activity in question is a 1:1 copy.
Copying on a 1:1 basis means that planning was copied from a reference
cost center to the same target cost center.
Note: Condition &V1& is not fulfilled.

System Response

You cannot copy the detail planning because all the conditions have not
been fulfilled.

How to fix this error?

Either copy your planning data without costings or make sure that the
above conditions are met.

Error message extract from SAP system. Copyright SAP SE.