Diagnosis
The maximum key length for entity types withstorage and use type 1 is 38characters. (This includes entity types that are directly or indirectlytaken into account due to relationships of the type leading.)
The maximum key length for entity types with storage and use type 2
is also 38 characters if they are used as additional entity typeswith the usage Hierachy Names. (This includes entity types thatare directly or indirectly taken into account due to relationships ofthe type leading.)
This prerequisite is not fulfilled for entity type &V2&.

System Response
The data model cannot be saved or activated.

Procedure
Change the settings for the data element and the assigned entity typesso that the entire key does not exceed 38 characters.