Hi @caio.cumbuca ,

Once you have ingested data into Amplitude, it is immutable. However, you can use drop filters as described here if you want to stop the data from being queried. It will still show up in user’s profiles though. However, if the data is particularly bad, you could consider deleting the project itself and then just importing into a new project. If you do go that route though, you might want to first play around with the file some more to ensure the correct procedure for loading in the properties first. 

Kind Regards,
Denis