Unsent data message

I am busy making a new project and has published it a few times as i am changing things.
On the phone, i see the project, with the ‘circely arrows’. When i tap on it, i see the ‘Update project’ screen and tap on ‘Yes, update now’. Here i get the ‘Unsent data’ message.
I have no projects that i have not saved and gone out of.

If there is nothing to sent, delete the project on device and install your last version again.

Thx, I’ll keep that option open.