Article ID: 123840, created on Dec 9, 2014, last review on May 15, 2016

  • Applies to:
  • Plesk 12.0 for Linux
  • Plesk 11.0 for Linux
  • Plesk 11.5 for Linux
  • Plesk 12.0 for Windows
  • Plesk 11.5 for Windows


Prior to removing user from system and database, please try to resync impersonation storage.

repair.exe --synchronize-impersonation-storage


Domain hosting creation failed:

An error occurred during domain update: An error occurred during changing of hosting settings: System user update is failed: User %username% already exists.


Initial root cause is to be researched. For some reasons user was not removed previously and still present in Plesk and OS.


Delete user manually from psa.sys_users , from system users and from ImpersonationCache Database:

mysql> delete from sys_users where login = '%username%';

mysql> delete windows system users `%username%` and `%IUSR_Username%` 

ImpersonationCache is SQLite DB located at %plesk_dir%\admin\db

sqlite> delete from ImpersonationUsers where login = %username%;

Search Words

when trying to create a domain, i get a message saying that a user already exists


Broken referencial integrity: Database id 34 is not found in data_bases

usuario desactivado

User already exists

create email account

System user update is failed

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