Replication of & to SMP failed - package status unchanged

What causes this issue?

An error occurred while copying the data to SAPNet.

System Response

The package status is not changed and the initial status is reproduced.

How to fix this error?

Analyze the cause of the error in the BZMO. After correcting the error,
attempt to change the status again.

Error message extract from SAP system. Copyright SAP SE.