So I've been trying to concatenate two tables, but after loading, I get two separate tables.
E.g. I try to concatenate TableNameHistoric inside TableName, but instead two tables are created: TableName and Sheet 1 (the same results as TableNameHistoric). Where results in TableName are nulls, and Sheet 1 are correct.
Also, I've tried in a separate app and it works, but when I traspose it to my current app this thing happens.
What exactly you are doing in the second app where it worked. In the first app do you have any extra table other than this two tables. Would you like to share the snipped of your code and the expected result.