why does my list still display data after I deleted it from the underlying database table

I created a data grid to display from a database table, and allow me to add new entries using an associated interface.

The data grid gets its data via a data store that is linked to the underlying MariaDB database.

I had created some dummy records using my data grid and its associated data entry interface.

Consequently, to clean it up, I went into the MariaDB and deleted the dummy rows from the database table.

However, the data grid still shows the rows I deleted.  It is only when you try to open the row in the associated interface to modify the row, that you notice that there are no values for the fields.

Can anyone explain how this might be occurring?  Is the data cached somehow in the data store object or perhaps the record type object?

Thanks heaps,

David