Yep this is common when the ignition switch key tumbler falls apart internally. You will need to remove the lock tumbler and replace it with a new one. Here is a guide that may help with instructions below you show you how to do the repair.
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.