Plesk 8.6 to 9.5 updater problem

[empati]

Hi,

I'm trying to update my panel from 8.6 to 9.5. When i use the updater under server>updater getting the error below. Any idea how can i fix the problem?

ERROR: PleskMainDBException
MySQL query failed: MySQL server has gone away

Additionally, an exception has occurred while trying to report this error: PleskMainDBException
MySQL query failed: MySQL server has gone away

0: /usr/local/psa/admin/plib/common_func.php3:250
db_query(string 'select flags, sort, filter, page, page_size from ListsParams where user_id="0" and user_type="1" and parentList_id="0" and list_name="autoinstallerreleaseslist"')
1: /usr/local/psa/admin/plib/class.cList.php3:190
cList->fetchListParams()
2: /usr/local/psa/admin/plib/class.cList.php3:91
cList->cList()
3: /usr/local/psa/admin/plib/autoinstaller/AutoInstallerReleasesList.php:24
AutoInstallerReleasesList->AutoInstallerReleasesList(object of type AutoInstaller)
4: /usr/local/psa/admin/plib/ui/server.autoinstaller.php:73
plesk__server__autoinstaller->accessItem(string 'GET', NULL null)
5: /usr/local/psa/admin/plib/UIPointer.php:519
UIPointer->access(string 'GET')
6: /usr/local/psa/admin/htdocs/plesk.php:19