This logical database cannot be used

What causes this issue?

In Release 4.0A, the nodes in the logical database have been redefined.
Each node contains a node name and the name of a structure from the
ABAP Dictionary. Up to Release 4.0A, the node name was the same as the
name of the structure. From Release 4.0A onwards, the two names may be
different (from now on they will be marked as type 'T' during logical
database maintenance).
From Release 4.0A other types such as 'S' or 'C' may be used.
The query can currently only process logical databases where both names
are idenctical for all nodes.

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?

Error message extract from SAP system. Copyright SAP SE.