To delete all V11 cards after you have upgraded to V12.
Please do the following
- Navigate to Browse on Anki
- On the left hand-side, find “note types”
- Find “AnKingOverhaul” (Important: this differs from AnKingOverhaul (AnKingMed / AnKingOverhaul). The former is the V11 note type, the latter is the V12 note type. Make sure to select the former “AnKingOverhaul”
- Cmd + A (Ctrl + A) → right click → notes → delete notes
You now only have V12 cards in your Anki!