Filtering and locking segments for CM and 100% matches and repetitions

Hi,

 

I'd like to lock all segments for CM and 100% matches and repetitions.

To do this, I first filtered segments with status "100%" and locked all filtered ones.

Then I filtered segments with All Repetitions option, select all filtered ones, and tried to select "Lock segments" option in the context menu.

But this appeared greyed out both in the context menu and Advanced>Lock Segment menu and I couldn't lock Repetitions.

Could you please let me know how I can successfully lock all segments for CM and 100% matches and repetitions?

 

Thanks.