What happens if original holding is removed after merger?

An example, I owned BKW but no SOL. The BKW/SOL merger occurred. Sharesight now, correctly, shows I have a closed BKW holding and a new SOL holding.

What happens if I delete/remove the original (now closed) BKW holding?

If I drill into the SOL holding it shows a reference to the BKW holding.

Would stuff break if BKW was removed?