Caution! Check the trading partner assignment

What causes this issue?

The partner cons unit assignment is identical to the consolidation
unit.
If this posting technique is mandatory, please be aware of any possible
ramifications in the elimination entries.

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?

Error message extract from SAP system. Copyright SAP SE.