Save another user profile if email already exists

Hello
When acting as a moderator and changing another user email in the frontend : if the email already exists in the database, Community Builder sends an exception and returns the standard joomla error page.
Would it be possible to have a joomla warning message instead explaining that the email already exists ? same message as displayed when doing the same thing in the backend ?
Thanks 

That should just be throwing a validation error and return to profile edit. What do you mean it's throwing an exception and going to an error page? Please provide the callstack for that error page as it sounds like you've something else installed that's erroring.

This is what I got when trying to save with an already existing email
File: /var/www/vhosts/cercle.business/html/libraries/vendor/joomla/database/src/Mysqli/MysqliStatement.php
Line: 138
Message: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')' at line 6 #0 /var/www/vhosts/cercle.business/html/libraries/vendor/joomla/database/src/Mysqli/MysqliStatement.php(138): mysqli->prepare()
#1 /var/www/vhosts/cercle.business/html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php(1020): Joomla\Database\Mysqli\MysqliStatement->__construct()
#2 /var/www/vhosts/cercle.business/html/libraries/vendor/joomla/database/src/DatabaseDriver.php(1785): Joomla\Database\Mysqli\MysqliDriver->prepareStatement()
#3 /var/www/vhosts/cercle.business/html/administrator/components/com_acym/libraries/joomla/database.php(15): Joomla\Database\DatabaseDriver->setQuery()
#4 /var/www/vhosts/cercle.business/html/administrator/components/com_acym/classes/user.php(754): acym_query()
#5 /var/www/vhosts/cercle.business/html/components/com_comprofiler/plugin/user/plug_acymailingcbintegration/acym.php(124): AcyMailing\Classes\UserClass->delete()
#6 /var/www/vhosts/cercle.business/html/components/com_comprofiler/plugin/user/plug_acymailingcbintegration/acym.php(318): getAcymTab->getCurrentUser()
#7 /var/www/vhosts/cercle.business/html/libraries/CBLib/CB/Legacy/cbPluginHandler.php(879): getAcymTab->saveEditTab()
#8 /var/www/vhosts/cercle.business/html/libraries/CBLib/CB/Legacy/cbTabs.php(1611): cbPluginHandler->call()
#9 /var/www/vhosts/cercle.business/html/libraries/CBLib/CB/Legacy/cbTabs.php(1418): cbTabs->_callTabPlugin()
#10 /var/www/vhosts/cercle.business/html/libraries/CBLib/CB/Database/Table/UserTable.php(1099): cbTabs->savePluginTabs()
#11 /var/www/vhosts/cercle.business/html/components/com_comprofiler/comprofiler.php(499): CB\Database\Table\UserTable->saveSafely()
#12 /var/www/vhosts/cercle.business/html/components/com_comprofiler/comprofiler.php(112): userSave()
#13 /var/www/vhosts/cercle.business/html/libraries/src/Dispatcher/LegacyComponentDispatcher.php(71): require_once('...')
#14 /var/www/vhosts/cercle.business/html/libraries/src/Dispatcher/LegacyComponentDispatcher.php(73): Joomla\CMS\Dispatcher\LegacyComponentDispatcher::Joomla\CMS\Dispatcher\{closure}()
#15 /var/www/vhosts/cercle.business/html/libraries/src/Component/ComponentHelper.php(361): Joomla\CMS\Dispatcher\LegacyComponentDispatcher->dispatch()
#16 /var/www/vhosts/cercle.business/html/libraries/src/Application/SiteApplication.php(218): Joomla\CMS\Component\ComponentHelper::renderComponent()
#17 /var/www/vhosts/cercle.business/html/libraries/src/Application/SiteApplication.php(261): Joomla\CMS\Application\SiteApplication->dispatch()
#18 /var/www/vhosts/cercle.business/html/libraries/src/Application/CMSApplication.php(306): Joomla\CMS\Application\SiteApplication->doExecute()
#19 /var/www/vhosts/cercle.business/html/includes/app.php(58): Joomla\CMS\Application\CMSApplication->execute()
#20 /var/www/vhosts/cercle.business/html/index.php(32): require_once('...')
#21 {main}[/code]

Your issue is coming from AcyMailings CB plugin. Appears to be throwing an error. Suggest contacting the developer regarding this.