This user does not have SAP_ALL profile assigned (see longtext).

What causes this issue?

This SDM User has no SAP_ALL profile assigned.

System Response

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

How to fix this error?

Note, that SDM User which needs to be assigned in this transaction will
be used for the execution of all Silent Data Migration classes. This
means, that the user needs authorization to execute the classes in this
client. If you choose a user with SAP_ALL profile, you can be sure that
all SDM classes will be executed correctly.
If you choose a user without SAP_ALL, you need to ensure that it has the
necessary authorizations for all of the SDM classes. Otherwise, some of
the SDM classes will be cancelled due to missing authorizations.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.