Incorrect string value warning when calling stored procedure in python

I have a database that has a stored procedure that I call it in my python script.
until yesterday there were no problem with it.
but yesterday my database server had a problem and restored the database.
now I'm getting this warning from the same code:

Warning: Incorrect string value: '\xD9\x88\xD8\xB2\xDB\x8C...' for column 'title' at row 1

I checked some encodings in DB :
In INFORMATION_SCHEMA.COLUMNS:

+--------------+--------------------+
| COLUMN_NAME  | CHARACTER_SET_NAME |
+--------------+--------------------+
| title        | utf8               |
+--------------+--------------------+

Database collation: latin1_swedish_ci
Table collation: utf8_general_ci
Column collation: utf8_general_ci
Server charset: UTF-8 Unicode (utf8)
(All are same as before!!)

and I'm connecting using this:

self.con=mdb.connect(host=self.host, user=self.user, passwd=self.passwd, db=self.dbname,use_unicode=True, charset="utf8");

and variable title is unicode.

I tried:

• Altering table and re setting utf8_general_ci for title column
• calling SET NAMES utf8 before calling procedure.
• Removing and re-creating stored procedure

None worked!!! :-(

I executed an insert query on a temporary table with Unicode content and it worked without that warning!!!

What is the problem?
how can I fix this?

Thanks