• Create a conditional breakpoint
• Click on the breakpoint in the gutter to get the "Disable instead of remove?" prompt
• Click "Disable breakpoint"
• Click on the breakpoint again in the gutter

The dialog that pops up asks if you want to disable the breakpoint instead of removing it; but it's already disabled. It would be better to ask if the user wants to remove it or enable it since it feels quite natural to re-enable it via the path you disabled it.