I am not sure what you mean. The event-sheet for this object has a lot of events and I want do "deactivate" all of them. I thought there would be a simple solution like "decouple the eventsheet from the object"
The way to exclude an event from happening is to use a global variable trigger.
Use a second condition on the event and check if the variable has been triggered.
Global Variable Trigger = 0
Event do something: change sprite
Trigger = 0
On event: Set Trigger = 1