SAP Message TW688 - Insert into view: Key &1 of Table &2 is not part of view &3 (&4)

Diagnosis
An entry of the view &V3& was imported to the system. This entry didnot exist yet and was therefore inserted. All the fields in TableV2, which are not contained in the view, have been set to initialvalues.
The key field &V1& in Table &V2& is not included in the view either.However, it has not been set to the initial value because duplicateentries might result from this.
The complete value for the key field entries is &V4&.

Procedure
The reaction described above isusually correct. The key field &V1& inTable &V2& was set the value that existed in the corresponding tableentry in the source system. Check the individual results of the importif necessary.