Unable to remove SQLite Databse file

I am new to Xcode and ios. I am using Xcode 7.3 version and swift2.2

I have removed a per-populated SQlite Db from my project. Later, I used Add file menu in Xcode to add the same name SQLite Db with only modified the content of the field. Example , fieldname :addr , the content :123, 5th ave , now the same filedname :addr ,the content :12, Broadway

After added the modified content SQLite DB, the code STILL using the old content that is 123,5th ave!

let querySQL = "select Sid, location, Addr from tblPlaces where Sid ="  + myId

 let result: FMResultSet? = MyDB.executeQuery(querySQL, withArgumentsinArray:nil)

 if result?.next() == true {

   let strAddr = results!stringForColumn("Addr")

 }else {

 }

What this happened? How to do the right way?

Thanks