Entry must match an item in the list.
You have typed something into a drop-down combo box that does not exist in the combo box list. For example, while designing a query you can select the sort type for specific columns. The choices are ascending, descending, or unsorted. If you type "notsorted" into the combo box, this warning message appears. You must use only the choices that are available in the combo box list.
To correct this error
Select one of the available combo box items.