What is wrong with the ignition of my car if the key won't go in the ignition? on 2004 Cadillac DeVille DTS

A foreign key was put into the ignition by mistake, now the right key won't key won't go in.

Asked by for the 2004 Cadillac DeVille DTS
sounds like the lock pins inside are gamaged call a mobile locksmith in your area to repair
1 more answer
maybe tumbler