From what I understand, in the initialization of the screen you are not creating a table. DROP is to delete tables, not to create them… then when you want to insert a data gives you the error that the table does not exist.
To create one you do so:
CREATE TABLE IF NOT EXISTS TableName (‘id’ INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, ‘SomeData’ TEXT, ‘SomeData2’ TEXT, ‘SomeData3’ DECIMAL);