Varieta' conservate presso un coltivatore custode

Errore durante la query 'select id_convenzione, id_varieta from varieta_assegnate where id_convenzione in () order by id_varieta, id_convenzione': You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') order by id_varieta, id_convenzione' at line 2

Errore durante la query 'select cod_elemento, tipo_reperto, nome, cod_attrib from elemento where cod_elemento in () and data_eliminaz is null': You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') and data_eliminaz is null' at line 1

Varieta'