Can I undo my action?

I created a new board and went to "Board Settings" > "Columns and Rows".

I choose "Columns are identified by" = "Type".

Different Types got listed and I changed the name of each Types to fit to my new board.

I didn't know that this would affect other boards, and now other boards are fucked up (especially swim lanes)!!!

I want to change the Type names back to the old ones but I don't remember them unfortunately.

Can I undo my action?

Your help would be very much appreciated!

Thank you,