Symptoms
After updating Plesk to 18.0.52, the extension "Premium Anti-Virus for Servers" (to which the Premium Antivirus component is converted in that Plesk version) is installed automatically.
Before updating, the Premium Antivirus component was not installed but the following record existed in the Plesk database:
# plesk db "select * from ServiceNodeConfiguration where name='virusfilter'"
+---------------+------------+-------------+-------+
| serviceNodeId | section | name | value |
+---------------+------------+-------------+-------+
| 1 | mailServer | virusfilter | drweb |
+---------------+------------+-------------+-------+
Cause
Premium Antivirus component was previously removed when Plesk Premium Antivirus while being selected at Tools & Settings > Mail Server Settings > Antivirus.
This is considered a bug with ID PPPM-14005
Resolution
Consider applying one of the following workarounds before updating Plesk:
1) install the Premium Antivirus component, set the antivirus to None in the menu Tools & Settings > Mail Server Settings > Antivirus, remove the Premium Antivirus component, and then proceed with updating Plesk;
2)Remove the record about virusfilter=drweb from the Plesk database (ServiceNodeConfiguration table).
