Jumps at deleted block keeps the block id and breaks the bot

[heloineto]

Describe the bug If you create a Jump to a group and provide a specific block, and then delete that block, the id remains. When the user reaches that block, the bot breaks and finishes the session.

I believe this is a bug because the same thing does not happen if you delete a group. The group's id is removed from the Jump.

To Reproduce Steps to reproduce the behavior:

1. Create a new jump to a specific block

2. Delete that block

5. See that the deleted block's id is still there

Expected behavior For the deleted block's id to be removed from the Jump, or a warning to be shown when the bot is published.