Display not possible for all revaluation definitions (-> long text)

What causes this issue?

The definition data for revaluation &v1& is to be displayed as defined
for cost element group &v2&, but this has changed since the last time
the revaluation was saved. In the display, you see the data on the
current status of the cost element group, but additional definitions
are in the database. The are two possibilities.
If you are creating a revaluation with reference, the aforementioned
explanations are valid for this reference. The new revalaution will be
properly updated when you save it.
If you are displaying or changing an existing revaluation, note the
following.

How to fix this error?

If you want to reatain the version stored in the database, so you can
carry it out again, you do not need to do anything. However, not all of
the data is displayed.
If you want to change the revaluation to match the status of the cost
element group, save the revaluation in change mode and it will be
updated in the database. If you do not make any real changes and simply
want to remove the data that no longer matches the cost element group,
go to a filled definition screen prior to saving, in order to simulate
the change.

System Response

Not all revaluation definitions are displayed.

Procedure for System Administrators

Old entries in database table T823Z.

Error message extract from SAP system. Copyright SAP SE.