How does one clear/delete the history/memory that appears to be used when one copies down cell values ?

When I copy down values from one or more cells in a row by selecting the desired cells with my cursor
and then click on the lower-right-side "handle" and pull it down into the corresponding cells of the rows below, unexpected (ghost) values are often pasted, which I might have used in the (dark) past.
These values are usually not relevant and produce erroneous results; especially if one is not aware of this ghost value copying.
How does one delete / clear this copy-down history / memory ?

I appreciate your help with this haunting problem whose solution I so far have not been able to find on the Internet.