Use step field validations on your steps to prevent their completion when the configured validation rules return true. Rather than setting up object-specific validation rules to control needed data for Conga Orchestrate steps, define validations directly on the step level in Conga Orchestrate and make sure that all data you expect is there and all conditions are met before moving on to the next step in the process.

Refer to Creating a Process Definition and Steps before creating step field validations.