Hi @Clement_V
Greetings!!
These settings are configured in Conflict Properties. You can check there. I doubt you can remove planned dates, but it’s better to review these properties.
https://INSTANCNAME.service-now.com/now/nav/ui/classic/params/target/system_properties_ui.do%3Fsysparm_title%3DChange%2520Management%2520Conflict%2520Analysis%2520Properties%26sysparm_category%3DChange%2520Collision
