MaintPlant & and work center plant & have different company codes

What causes this issue?

<GL:maintenance_plant>Maintenance plant</> &V1& and work center plant
&V2& do not refer to the same <GL:company_code>company code</>.

System Response

The combination is allowed, but the system will have to generate
periodic clearing entries between the company codes for cost
allocation processing between account assignment objects belonging
to different company codes.

How to fix this error?

Check your entries.

Error message extract from SAP system. Copyright SAP SE.