Paste attributes shortcut in Premiere Pro is creating markers

Hello,

In recent weeks i've experienced an issue when trying to paste attributes from one clip to another in Premiere Pro. For example if i've added a blur to a clip and want that effect elsewhere i'd copy that clip, then remove attributes from the clip I need the effect on, then use the shortcut for pasting attributes CTRL+ALT+V, and that would do the job. I've had a look at the keyboard shortcut window under Edit and this shortcut has'nt been changed. However, now when I try to use the shortcut, a marker is created and a pop up window relating to the marker displays.

Is there a simple fix to regain the desired functionality of this shortcut.