Error: field is required

I have done a code, in which i create events. When i create event there was a field named "detailed_address" which i have removed now, from database, from model,from the edit page, from every where.

Creating an event works fine. but when i edit that event and save it, there is error as:

The detailed address field is required.

I have checked my code for at-least 5 times there is no word detailed address now used.

Can any one tell what will be my problem?

via Chebli Mohamed