System change option: &

What causes this issue?

The system change option can be set as follows:
<ZH>All objects are modifiable</>
All objects can be modified in this SAP system.
<ZH>Hot Package system </>
Changes can only be made to particular object types.

System Response

The function is continued.

How to fix this error?

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.