Hi Uma,
are the info-providers that use this info-object already moved to other system? quality/prod ?
Try to change and activate the object in Developement system and while activating you will receive warning messages from all the objects that will turn inactive after this change. Check what all objects are getting affected and take a decision accordinly.
If you dont want to take this risk then as Loed suggested you can try this by a dummy object. Like create an object with ALpha conversion use it in any dummy infoprovider-> load data -> try to change the Alpha conversion.
when you say that you want to change the behaviour of this info-object, you must understand that the behaviour will change universally and you will need to reload data for all the infoproviders as the behaviour of the object now needs to be changed and it should uniform behaviour everywhere.
Hope this helps.
-Swati.