[5.2] Error on saving nested Subform

[coolcat-creations]

Steps to reproduce the issue

When I try to save this nested subform, the entries are saved but still I get the error:

Save failed with the following error: Field 'value' doesn't have a default value

If I disable the nested subform no error appears.

Expected result

no error

System information (as much as possible)

The currently installed Joomla! version is "‎5.2.0-rc1-dev" ‎5.2.0-rc1-dev

[brianteeman]

From the information provided I could not replicate the error

[coolcat-creations]

Maybe because I updated the site with an update package ? No clean installation...
Not sure how to debug.

[coolcat-creations]

I tested it on another site I upgraded from 5.1.4 to 5.2 nightly build and same:
The error appears when data is added into the nested subform (in my case the grid items)

[brianteeman]

are you sure the problem isnt from the first field where you have not selected an item?

[coolcat-creations]

Yes because if I leave the "grid" fields empty the error does not appear and because in my first testing site no other fields exist.

[hayyi]

I encountered the same error, but resolved it by changing my database column from non-nullable to nullable, which made the error disappear. I'm not sure if this is related to your issue, but it might be worth checking your database for the stored value

[coolcat-creations]

Ok but thats a fresh install of 5.1.4 + Update to RC1, not sure sending the users to the database is a good user experience. Maybe this set to Nullable could be implemented in the update?

[brianteeman]

It should be NULL by default

[coolcat-creations]

I confirm it was NULL

[brianteeman]

So it is nothing to do with that then

[coolcat-creations]

Agree, but the error is there anyway.