you don't have permission, within the database, to update, add, and/or modify. I've not played with SQLITE, so the exact syntax may not be the same (in other words, hit the documentation and read... don't just blindly type this!!), but if you log in as the database administrator account (which should have access to everything), you can grant rights to the other account(s) in the database.

GRANT ALL ON <database> TO <username> IDENTIFIED BY <password> WITH GRANT OPTION;

The username/password is the database username and password, not (necessarily) the system username and password!