User Configuration > Administrative Templates > Microsoft Project 2016 > Project Options > Calculation > Calculation options for 'Project1'
User
HKCU\software\policies\microsoft\office\16.0\ms project\options\calculation
Specifies that a single critical path is calculated throughout the master project, by treating inserted projects as summary tasks in the master project. If you enable this setting, the critical path is calculated by treating inserted projects as summary tasks. If you disable or do not configure this setting, the user's default setting is used.