Predecessor phase field is mandatory for phases

Hello,

My experience tells me that in cProjects, it is not possible to have phases without a predecessor phase filled in, except if it's the first phase. Except for the first phase, all the next phases are obliged to have a predecessor phase.

As we know, in real life it's possible to have a phase starting in parallel with another.

Is it possible to have phases without the predecessor phase filled in?

Thank you.

Regards,

Gonçalo Mouro Vaz