This is a bug. 

Hi, 

I've looked on your model and reproduced  error.  Tables "attachment" and "comments" have the same name of primary key constraint. Primary key constraint name must be unique. Please change the name or "Unset" property. Check other tables also. 

The fix is on production already. 

Here is a short instruction how to set default values.

1. Go to the model details page (Control-m)



2.  Click "Additional Properties" on the right side

3. You'll get that screen:



4. Change default values.
5. Back to the diagram
6. Add new tables. Every new table will have "on clause" set.


Hope this helps. Sorry for delay.

Hi,

We've added that validation.  Please check it and let's us know what you think about it.

Hi Craig, 
There is an option to set defaults but doesn't work as it should be. I've planned to give an instruction but found a bug. grrr. I think it will be fixed in the next week. Please be patient and sorry for  inconvenience.