The transferred planning data share the same key

What causes this issue?

You have transferred a table of planning data that contains two records
with the same logical key. This is not permitted. The logical key can
consist of characteristic values from any of the characteristics in the
planning level.

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?

Transfer a table of planning data for which each record has a different
combination of characteristic values.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.