User Configuration > Administrative Templates > Microsoft Project 2016 > Project Options > Schedule > Scheduling options for 'Project1'
User
HKCU\software\policies\microsoft\office\16.0\ms project\options\scheduling
This policy setting automatically links tasks when you cut, move, or insert them. If you enable this policy setting, tasks will automatically be linked when you cut, move, or insert them. If you disable or do not configure this policy setting, tasks will not automatically be linked when you cut, move, or insert them.