ITIN Applied for | What to fill in online form on INDIANA integer only field

I have applied for ITIN for my spouse. I am filling online extension form with IN using the INTIME system. The online form is asking for spouse ITIN and doesn't let me leave it empty or write a text like applied in it. What should I do there? Can I fill [removed]? It is not allowing me to write [removed] as well.

 

Please feel free to ask clarifications.

 

Thanks,