I noticed that since yesterday all my submissions didn't go directly to my Spreadsheet

- I created a form in one of my accounts (user: delia.grigoroiu@entreprenation.ro) where I integrated the submissions with a Google Spread Sheet. I noticed that since yesterday all my submissions didn't go directly to my Spread Sheet (they went in a new Spread Sheet).

Have you re-integrated your form with Google Spreadsheet? When form is re-integrated new spreadsheet file will be crated and new submissions will be sent only to new spreadsheet file. 

If I did not understood your issue correctly, please provide us more details about your issue and ID of your form.

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