Error :Invalid update. Task cannot start before the project start date. Adding a Project Task whose start date is before the Project's planned start dateIssue Adding a Project Task whose start date is before the Project's planned start date does not work when com.snc.project.rollup_project_start_date is set to falseFollowing error displays in the Planning Console: -------- Invalid update. Task cannot start before the project start date --- Steps to reproduce: Issue reproduced out of the box in the base system in Quebec- Planning Console ------------------ 1. Change property com.snc.project.rollup_project_start_date to false 2. Create Project with several Project Tasks and plan to start in September, 2021 3. Open the Project in the Planning Console 4. Open the 1st Project task, change state to complete, set actual date as today, save 5. Re-plan 2nd task earlier than September e.g August 24 but after actual start date of the project Following error appears: -------- Invalid update. Task cannot start before the project start date --- CauseThe functionality is working as expected.ResolutionFeedback from our Product Development team: If you make "com.snc.project.rollup_project_start_date" flag false then planned start date of project will remain the same and this is why it is not possible to move planned start date of project task earlier than project planned start date and it is showing error message planning console . According to the documentation: - Properties installed with Project Management------------------ Roll up project start date from tasks com.snc.project.rollup_project_start_date If set to true, the project planned start date rolls up from the planned start date of the earliest task. Disable this property if you want the project planned start date to remain the same despite the start date of the earliest task. Default value: true ---------------------