OCSNG : Trace_Deleted already activated

Hello guys,

I need some help, i don't find any solution in the web.

I have a GLPI server in is 9.3.3 with the plugin "OCS Inventory NG" is in 1.5.6.

We try to connect to the database of my server OCS Inventory is in 2.5.

But we have the error "Configuration OCSNG invalid (Trace_deleted must be activated)".

The option is correctly enable on my OCS server.The OCS server configuration :

    Version de PHP :  5.5.21
    Serveur Web : Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips PHP/5.5.21 mod_perl/2.0.10 Perl/v5.16.3
    Serveur SQL :  MariaDB Server version 5.5.60-MariaDB
    Version OCSReports:  2.5

Do you have any idea ?

Thanks in advance,