Plesk - Domain is temporarily disabled for backup/restoring

Symptom
1. Domain status is inactive
2. Can't activate domain
3. There is some warning "Warning: The domain is still suspended for the following reason: Domain is temporarily disabled for backup/restoring."

Cause
1. backup/restore in progress.
2. There is incorrect information in plesk databases.

Solution
1. restart server to clear pending process.
2. login to plesk database
3. run sql command
update domains set status='0' where name='domain.dom';
4. login to plesk control panel
5. suspend and reactivate the domains.

More information about Plesk domain status codes
0 = active domains
4 = backup/restore in progress
16 = suspended domains
64 = suspended by client
256 = expired domains