Item &1 and contra item &2 have different breakdowns

What causes this issue?

You assigned breakdown category &V3& to FS item &V1&. This breakdown
category has different breakdown properties than the breakdown category
of contra item &V2&. In general, however, the same breakdown category
should be assigned to an FS item and its contra item.

System Response

Warning

How to fix this error?

Choose the breakdown category assigned to contra item &V2&, or use a
contra item that uses breakdown category &V3&.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.