Unlike MySql, postscript etc. there is no such thing as an admin account for sqlite. Sqlite does not use any login of any description it was designed as an embeddable database system and things like grant and revoke do not make any sense. The only time you are likely to get this error is if you are trying to write to an sqlite2 db with sqlite3.
If it is an sqlite2.x db then use sqlite2.x to export the records then import to a new sqlite3 db ( or just use sqlite2.x )

Rick