InfoObject & is a non-cumulative value.

<ZH><ZK>&CAUSE&</></>
You tried to assign an InfoObject that is a non-cumulative key figure.
Non-cumulative key figures can however only be assigned if you have set
the indicator <ZH><ZK>"Initial non-cumulative" </></> in the transfer
structure maintenance for this DataSource to this source system.

How to fix this error?

Only use InfoObjects that are not non-cumulative keyfigures.

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.