duplicated value (valor duplicado)

[Syndicate_Admin]

Good, after performing some transformations of my data I get the following error:

Comisiones_Agents_Particion
The "PROJECT" column of the "Comisiones_Agents_Particion" table contains the duplicate value "ENDESA", and this is not allowed for columns on one side of a multi-to-one relationship or for columns that are used as the primary key of a table.
Cost table
OLE DB or ODBC error: HRESULT exception: 0x80040E4E.

I do not understand very well why it is due since I have made a union between several tables where the key field is Project and date and ENDESA values should be able to be duplicated since they vary in the date.

Thanks in advance.

Greetings.

[amitchandak · Accepted solution]

@Syndicate_Admin , Please check your relationship with the other tables, PROJECT table is on 1 side of one to many relation and the key column is expected to be unique. Change the relationship