warning apache error.log

Hello,

I have a problem in the apache error logs. I have this error:

DBD::mysql::db do failed: Illegal mix of collations 
(latin1_general_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for 
operation '=' at 
/usr/local/share/perl/5.24.1/Apache/Ocsinventory/Server/Inventory/Cache.pm
 line 46.

 Can you tell me how to fix it?
 thank you