I am having an error when creating an asset in Assets. the error message looks like this.

Integrity Error

The operation cannot be completed, probably due to the following:
- deletion: you may be trying to delete a record while other records still reference it
- creation/update: a mandatory field is not correctly set

[object with reference: warranty_date - warranty.date]

i cant see any warranty date in the asset form. why is this happening ?

Thanks!