It is only possible to introduce new non-leading ledgers via
a migration service. This is what message FAGL_MIG223 is explaining.
In case you would like to newly introduce non-leading ledger L1 in the
system, a migration service is necessary. Further information on that
can be found in the SAP service market place alias /GLMIG.
To ensure the consistency of the data for a company code that is
already used, other activities need to be performed, such as the
o Define assignment time/date
o Ensure completeness
o Build opening balances of the new ledger
This function can only be performed with the assistance of the SAP
General Ledger Migration Service. For more information, see SAP Note
o If the ledger is assigned to a company code that is already used in
your production system, you need to cancel the assignment and start
by activating the migration service. Otherwise, it is not possible
to update the posting data consistently to the ledger or to build
If the company code to which the ledger is assigned is not used in
your production system, you can save the assignment in this step. In
this case, however, it is not possible for the data in the ledger to
be complete, and the opening balances cannot be built for the
If the company code to which the ledger is assigned has been created
as new, you can save the assignment in this step and build the data
by transferring it from the feeder system or by using opening
Please ensure you review note 1227504 in full.