Diagnosis
The report could not make an entry here because there was a dataanomaly in the tables it read to create the new entry.
This is not a problem in itself, as it may only be that you have anentry in a table that can be used as an attribute in another table, butis not. However, in the report's data conversion, it detectedthis, did not create an entry for this unused attribute and thenproduced this warning.

Procedure
If you require this entry, create it by hand in the new table.