User Configuration > Administrative Templates > Microsoft Project 2016 > Project Options > Schedule > Schedule options for Microsoft Project
User
HKCU\software\policies\microsoft\office\16.0\ms project\options\scheduling
Displays messages about schedule inconsistencies, such as a successor task starting before the finish of the predecessor task. If you enable this setting, users will be alerted about scheduling inconsistencies. If you disable or do not configure this setting, the user's default setting is used.