Copy database not working: no errors are shown in Plesk GUI

Symptoms

• Unable to copy database under Plesk > Domains > example.com > Databases > Copy.

• No errors are shown in Plesk GUI.
• There are the following records in %plesk_dir%admin\logs\php_error.log after Enabling Plesk Debug:

CONFIG_TEXT: [2017-08-15 10:24:23] ERR [1] PleskUtilException: E:\Parallels\Plesk\/admin/bin/dbbackup --copy "-server-type=mssql" -with-data "-src-server=(local)" "-src-port=0" "-src-server-login=dbuser" "-src-server-pwd=<password>" "-src-database=ORIGINAL_DB" "-dst-server=(local)" "-dst-port=0" "-dst-server-login=sa" "-dst-server-pwd=<password>" "-dst-database=CLONED_DB" failed with message: Command 'IF NOT EXISTS (SELECT * FROM sys.views WHERE object_id = OBJECT_ID(N'[Accounting].[AccountCatalogView]'))
EXEC dbo.sp_executesql @statement = N'
CREATE VIEW [Accounting].[AccountCatalogView]
as
[...]
' failed
 Invalid object name 'Accounting.AccountCatalog'.
file: E:\Parallels\Plesk\admin\plib\common_func.php
line: 89
code: 0
trace: #0 E:\Parallels\Plesk\admin\plib\common_func.php(17): util_exec(string 'dbbackup', array, array, string 'msg', string 'E:\Parallels\Plesk\/admin/bin')
#1 E:\Parallels\Plesk\admin\plib\Os.php(115): smart_exec(string 'dbbackup', array, string 'msg')
#2 E:\Parallels\Plesk\admin\plib\DatabaseManager.php(1347): Os::exec(string 'dbbackup', array)
#3 E:\Parallels\Plesk\admin\plib\Db\Clone\Task.php(42): DatabaseManager->cloneDatabase(object of type Database, object of type Database, boolean true)
#4 E:\Parallels\Plesk\admin\plib\Db\Table\Broker\LongTasks.php(261): Db_Clone_Task->run()
#5 E:\Parallels\Plesk\admin\plib\Db\Table\Broker\LongTasks.php(181): Db_Table_Broker_LongTasks->_syncStart(object of type Db_Table_Row_LongTask)
#6 E:\Parallels\Plesk\admin\plib\Db\Table\Broker\LongTasks.php(113): Db_Table_Broker_LongTasks->_startQueue(object of type Db_Table_Row_LongTask, boolean true)
#7 E:\Parallels\Plesk\admin\plib\Task\Async\Executor.php(52): Db_Table_Broker_LongTasks->start(object of type Db_Table_Row_LongTask, string 'synchronously')
#8 E:\Parallels\Plesk\admin\plib\scripts\task-async-executor.php(12): Task_Async_Executor->execute()

[2017-08-15 10:24:23] ERR [panel] Task failed: id=3717, pid=43812, type=db-clone, error=Database cloning failed.
DEBUG [panel] Db_Clone_Exception: Database cloning failed.
file: E:\Parallels\Plesk\admin\plib\Db\Clone\Task.php
line: 53
code: 0
trace: #0 E:\Parallels\Plesk\admin\plib\Db\Table\Broker\LongTasks.php(261): Db_Clone_Task->run()
#1 E:\Parallels\Plesk\admin\plib\Db\Table\Broker\LongTasks.php(181): Db_Table_Broker_LongTasks->_syncStart(object of type Db_Table_Row_LongTask)
#2 E:\Parallels\Plesk\admin\plib\Db\Table\Broker\LongTasks.php(113): Db_Table_Broker_LongTasks->_startQueue(object of type Db_Table_Row_LongTask, boolean true)
#3 E:\Parallels\Plesk\admin\plib\Task\Async\Executor.php(52): Db_Table_Broker_LongTasks->start(object of type Db_Table_Row_LongTask, string 'synchronously')
#4 E:\Parallels\Plesk\admin\plib\scripts\task-async-executor.php(12): Task_Async_Executor->execute()

Cause

Plesk bug ID #PPPM-6901, which is planned to be fixed in future Plesk updates.

Resolution

As a workaround export and then import database under Plesk > Domains > example.com > Databases > Export Dump/Import Dump.