Customet To Vendor Communication Instalation Problem

Hi there

I'm trying to install customer-to-vendor communication addon, but theres something wrong, i get this error message:

An error in an SQL query occurred during the add-on installation. The add-on will not be installed.
Duplicate entry 'manage_vendor_communication' for key 'PRIMARY' (1062): INSERT INTO HGdbprivileges (privilege, is_default, section_id) VALUES ('manage_vendor_communication', 'Y', 'addons');
Duplicate entry 'view_vendor_communication' for key 'PRIMARY' (1062): INSERT INTO HGdbprivileges (privilege, is_default, section_id) VALUES ('view_vendor_communication', 'Y', 'addons');

Anyone knows why theres a duplicate entry ? and how to resolve it without messing up the database?

Thank you,

Adrian

Before the installation run this SQL query:

DELETE FROM HGdbprivileges WHERE privilege IN ('manage_vendor_communication', 'view_vendor_communication');

it worked!

Thank you!

A