in excel importer I dont want to save blank page what can I do for that

In excel importer I don’t want to import same data again and also I don’t want to import wrong data in it what can I do for that
1 answers

When importing data from excel I am using 2 entities. One entity which is used by the app and another entity (with same attributes) only used for the import. 
My import microflow ...
- deletes old content from import-entity
- imports excel data into empty import-entity
- after import into “import”-entity the microflow compares content of “import”-entity and “app”-entity and decides which object in “app”-entity has to be created, updated or maybe deleted.