Improve "The XYZ could not be created because the data didn't validate."
|Reported by:||anonymous||Owned by:||nobody|
|Has patch:||no||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
When saving a form, I get this error message. It tells me which model is not correct and that it couldn't be created. But it gives me no clue what data is wrong. What is data, what is data expected to be. Which attribute is wrong.