This will lock it in the active state and it will continuously stimulate adenylate cyclase. The sustained adenylate cyclase activity will lead to a sustained increase of cAMP which will cause electrolyte and water loss, causing diarrhea.
This action will activate the system, leading to continuous stimulation of adenylate cyclase, which results in a sustained increase of cAMP, ultimately causing electrolyte and water loss and subsequently diarrhea.