SAP Message UGMD567 - Data loss in the records with the identical key &2 in table &1

Diagnosis
The fiscal year variant conversion in database table &V1& created datarecords with the same key: &V2&. The table key includes time references(for example, the fiscal year and period in hierarchy tables).
Two or more data records with different fiscal years and/or periods wereconverted with the same target time periods. One possibility may be thatthe target fiscal year variant has less periods or less special periodsthan the source fiscal year variant.

System Response
Only the first data record with the key &V2& will be saved in convertedform in the database table. Consequently, database table &V1& will havea lower number of entries after the conversion.
No changes are saved when the conversion is run in simulation mode.
Only the first data record with the new key is saved. All others arediscarded. These cannot be saved because the table key needs to beunique.

Procedure
Check the data records to be discarded and, where applicable, change thefiscal year variant settings. If you already expected this kind ofoutcome from converting the fiscal year variants, execute the conversionin operational/update mode.