isolver: no longer crash when user ask to replace item at a non visited location (like after the server sessions have been deleted).
isolver: no longer crash when user ask to replace item at a non visited location (like after the server sessions have been deleted).

theonlydude/RandomMetroidSolver,theonlydude/RandomMetroidSolver,theonlydude/RandomMetroidSolver,theonlydude/RandomMetroidSolver,theonlydude/RandomMetroidSolver