Custom fields have moved between boards overnight

[roger smith]

Our custom fields have randomly moved between our team's boards overnight. Is there a way of getting them back in the right place, allocated to the correct cards? Is there a way of getting a backup form 24 hours ago? There is nothing showing in the activity reports on any of the boards that shows that anyone has moved anything or disabled boards etc. Serious help needed, as this runs our whole business. Thanks...

[Iain Dooley]

@roger smith Custom fields will get added to boards when cards are moved between boards that have values allocated to those fields, but I've never heard of any fields being removed from a board. Are you saying that some fields were added, and some were removed? 

Also, custom field changes (adding/deleting) are shown in the board's activity feed like this:

So if someone had added or removed any you'd know about it.