change surce - problem

Hi,

I have report which use field X.

Last time I change definition of this object in .unv (name remains the same) and report which used this field got me error:  Some objects are no longer available in the universe.

So I tried to change source to map new field with this field: Data -> Change Source -> New data source and ther I see that field X is removed so I wanted to choose new field but I can't, the button 'OK' is inactive.

Is it possible to map problematic field to new one without edit report ?

I use: BO 4.0 SP5 FP11

Regards