Is your feature request related to a problem? Please describe.
When you do inverse printing to manually change color it is impossible to use the sequential printing. This is because the slicer detects that objects are essentially touching. But in case of reverse printing, this is a wanted behavior of the parts.

Describe the solution you'd like
It would be nice to have the option to ignore the error and have the slicer arranging the slicing anyway

Describe how it would work
By clicking on now inactive "Invalid data" you can be prompted to accept the error and force to slice.

Describe alternatives you've considered
Alternatively you need to print the first object and then the second in a classic inverse printing style. However this is slightly tedious because you need to go back to the slicer, slice the object, send it to printer and meanwhile make sure you arrange the filament swap on the printer.

Additional context
n/a