Before doing anything, be sure it really is the wrong spouse. Many people have the same common name. Before making a change such as detaching a spouse, it is imperative that you have good sources to prove your assertion. Could it be a different person with the same name? Could the individual have married more than once? If you detach, add a == Research Notes == section to the biography giving the Wiki-ID for the person removed and why it was removed, together with a citation of the primary document with the correct information. An internet family tree (which could be wrong) is by itself not a good source.