The error occurred due to an explicit constraint, like when attempting to add two objects with the same UID.
The database file is corrupt. (Since: 3.44)
An attempt was made to fetch results past the end of a the list.
An error was reported from the SQLite engine
A query was invalid.
An error occured while loading or creating the database.
An object was not found by UID (this is different from a query that returns no results, which is not an error).
A field requested for inclusion in summary is not supported.
A query was not supported.
Defines the types of possible errors reported by the #ECache