Error "Project task start cannot be earlier than project start date." on creating task with same date as project start date from project workbenchIssue After Upgrade, receiving "Project task start cannot be earlier than project start date." error message on creating task with same date as project start date. Steps to reproduce: Create a new projectNavigate to project workbenchOpen the created projectClick the + button which says add phaseIn the start date field select the Start date of the project and fill out the other fieldsOnce saved or on submit the Error message "Project task start cannot be earlier than project start date" appearsCauseThe System Property "ent.project.rollup_project_start_date" is false and that is why the business rule "Validate pre-dating of child tasks" is triggering. Out-of-box (OOB) this property is set to true.ResolutionSetting the property 'ent.project.rollup_project_start_date' to True resolves the issue.