All target tables already exist. Creation not necessary.

What causes this issue?

All the target tables you want to create already exist.
Tables that already exist will not be overwritten.
These tables are not be activated and the indicator "No Namespace
Required" is not set.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

No tables have been copied.

How to fix this error?

If however, you still want to use these target tables, check that their
structures match the structures of the corresponding source tables,
and ensure that the tables are active.
If necessary set the indicator "No Namespace Required" for tables of
delivery classes G and E.
Alternatively you can choose a namespace prefix for the target tables
where the tables you want to create do not already exist.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.