Spreadsheet update

[Mariela]

Hello, I am trying to develop a basic app to report sales and costs. I can register data in the app, but the spreadsheet is not update. I have a _RowNumber column (Type Number), but not defined as label or key. And I have an ID column (Type Date Time) defined as label and key. Thanks for your help.  I do not receive any warning about this problem.

[SkrOYC]

Make sure your ID is not changing.

Also, we usually recommend an ID that serves just the purpose of being unique, not being visually helpfull. So your datetime doesn't sound like the best option:

What is a key? - AppSheet Help
UNIQUEID() - AppSheet Help