Error:CustomSQL can not containt optional prompts. (WIS 10812)

Hi Team,

I am trying to add one prompt:

And

( (@Variable('BOUSER') in (select GERS_BO_USER_SECURITY.USER_ID from GERS_BO_USER_SECURITY ) OR (GERS_Property_F.PROJECT_NAME) is null)  )

But when I add these query in existing SQL, I am gating error :

CustomSQL can not containt optional prompts. (WIS 10812)

Currently, 9 prompt is already exists in SQL.

Please help me to understand why, I am gating this error.

I am using BO 3.1.

Thanks

Sam