Prohibit user from advanced merging past target limits

My venue had a crash of the console caused when doing an advanced merge. The merge was passed the bounds of the target limits.

In this case it was:

  • Submasters: Start 900, End 999, Target 1000

When a user attempts to merge past a targets limit, I feel the console should prevent you from doing so. Preferably this would happen with some sort of message to tell you why, that allows you to to edit the current advanced merge, instead of having to start your merge over.

In this case the message could be (or similar):

  • "Can not perform merge. Submasters upper limit 999"