Package & has integration system &

What causes this issue?

You are trying to create an object in development class &v1&, for which
the integration system is the system &v2&. The current system is the
consolidation system for this development class.

System Response

No objects for this development class can be created in this system.

How to fix this error?

Please check the selected development class.

Error message extract from SAP system. Copyright SAP SE.