It looks like you changed variable types after using them in the BP? This can cause headaches; Unreal doesn’t always have the sense/ability to update your references/usages.
I conclude this as you have a variable with 2 pins coming out. Old, red pin was the previous type, the new, unused pin is above it..
I think you will need to reconnect the proper/newer pins and it should be ok if the typing is correct..