The following message displays because you have copied multiple values and are attempting to paste them into non-adjacent cells in the grid. You can proceed with a paste if you select a single cell or adjacent cells that match the size and shape of the cells from your copied values.
Three values were selected then copied in this example.
Then three non-adjacent cells were selected. Selecting the Paste option at this point would cause the invalid selection message to display.
You can proceed with the paste by changing the selected area, as done below. A single cell that had enough Updated enabled cells below it to accept the full paste was right-clicked and then Paste was selected from the grid pop-up menu.