U_ILLEGAL_CHAR_FOUND Error while updating one row

Database

U_ILLEGAL_CHAR_FOUND Error while updating one row

Hi,

I am getting this error while updating one record.

*** Error: UTF8 validation failed.

 TDICU UErrorCode: 12 - U_ILLEGAL_CHAR_FOUND

 ***

Note: Target data is having '?' special character_alphabets for two columns. Is that the issue.

Can you please suggest me how to over come this wile running my update query in prod without error.

Thanks in advance!

REgards,

hari