FYI extended-field is also installed, and enabled.
[2019-01-16 13:57:07] mautic.CRITICAL: Uncaught PHP Exception Doctrine\DBAL\Exception\DriverException: "An exception occurred while executing 'INSERT INTO audit_log (user_id, user_name, bundle, object, object_id, action, details, date_added, ip_address) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)' with params [3, "Virgil .", "lead", "field", "", "create", "a:5:{s:5:\"alias\";a:2:{i:0;N;i:1;s:7:\"afb_age\";}s:4:\"type\";a:2:{i:0;s:4:\"text\";i:1;s:6:\"number\";}s:6:\"object\";a:2:{i:0;s:4:\"lead\";i:1;s:13:\"extendedField\";}s:5:\"label\";a:2:{i:0;N;i:1;s:3:\"Age\";}s:10:\"properties\";a:2:{i:0;a:0:{}i:1;s:62:\"a:3:{s:9:\"roundmode\";i:6;s:5:\"scale\";i:0;s:9:\"precision\";i:0;}\";}}", "2019-01-16 03:57:07", "101.162.1.1"]:
SQLSTATE[HY000]: General error: 1366 Incorrect integer value: '' for column 'object_id' at row 1" at /var/www/torpedo/mautic/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractMySQLDriver.php line 115 {"exception":"[object] (Doctrine\\DBAL\\Exception\\DriverException(code: 0): An exception occurred while executing 'INSERT INTO audit_log (user_id, user_name, bundle, object, object_id, action, details, date_added, ip_address) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)' with params [3, \"Virgil .\", \"lead\", \"field\", \"\", \"create\", \"a:5:{s:5:\\\"alias\\\";a:2:{i:0;N;i:1;s:7:\\\"afb_age\\\";}s:4:\\\"type\\\";a:2:{i:0;s:4:\\\"text\\\";i:1;s:6:\\\"number\\\";}s:6:\\\"object\\\";a:2:{i:0;s:4:\\\"lead\\\";i:1;s:13:\\\"extendedField\\\";}s:5:\\\"label\\\";a:2:{i:0;N;i:1;s:3:\\\"Age\\\";}s:10:\\\"properties\\\";a:2:{i:0;a:0:{}i:1;s:62:\\\"a:3:{s:9:\\\"roundmode\\\";i:6;s:5:\\\"scale\\\";i:0;s:9:\\\"precision\\\";i:0;}\\\";}}\", \"2019-01-16 03:57:07\", \"101.162.1.1\"]:
SQLSTATE[HY000]: General error: 1366 Incorrect integer value: '' for column 'object_id' at row 1 at /var/www/torpedo/mautic/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractMySQLDriver.php:115, Doctrine\\DBAL\\Driver\\PDOException(code: HY000): SQLSTATE[HY000]: General error: 1366 Incorrect integer value: '' for column 'object_id' at row 1 at /var/www/torpedo/mautic/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php:107, PDOException(code: HY000): SQLSTATE[HY000]: General error: 1366 Incorrect integer value: '' for column 'object_id' at row 1 at /var/www/torpedo/mautic/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOStatement.php:105)
[stacktrace]
#0 /var/www/torpedo/mautic/vendor/doctrine/dbal/lib/Doctrine/DBAL/DBALException.php(128): Doctrine\\DBAL\\Driver\\AbstractMySQLDriver->convertException('An exception oc...', Object(Doctrine\\DBAL\\Driver\\PDOException))
#1 /var/www/torpedo/mautic/vendor/doctrine/dbal/lib/Doctrine/DBAL/Statement.php(177): Doctrine\\DBAL\\DBALException::driverExceptionDuringQuery(Object(Doctrine\\DBAL\\Driver\\PDOMySql\\Driver), Object(Doctrine\\DBAL\\Driver\\PDOException), 'INSERT INTO aud...', Array)
#2 /var/www/torpedo/mautic/vendor/doctrine/orm/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php(281): Doctrine\\DBAL\\Statement->execute()
#3 /var/www/torpedo/mautic/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php(1014): Doctrine\\ORM\\Persisters\\Entity\\BasicEntityPersister->executeInserts()
#4 /var/www/torpedo/mautic/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php(378): Doctrine\\ORM\\UnitOfWork->executeInserts(Object(Doctrine\\ORM\\Mapping\\ClassMetadata))
#5 /var/www/torpedo/mautic/vendor/doctrine/orm/lib/Doctrine/ORM/EntityManager.php(356): Doctrine\\ORM\\UnitOfWork->commit(Object(Mautic\\CoreBundle\\Entity\\AuditLog))
#6 /var/www/torpedo/mautic/app/bundles/CoreBundle/Entity/CommonRepository.php(801): Doctrine\\ORM\\EntityManager->flush(Object(Mautic\\CoreBundle\\Entity\\AuditLog))
#7 /var/www/torpedo/mautic/app/bundles/CoreBundle/Model/AuditLogModel.php(65): Mautic\\CoreBundle\\Entity\\CommonRepository->saveEntity(Object(Mautic\\CoreBundle\\Entity\\AuditLog))
#8 /var/www/torpedo/mautic/app/bundles/LeadBundle/EventListener/LeadSubscriber.php(181): Mautic\\CoreBundle\\Model\\AuditLogModel->writeToLog(Array)
#9 [internal function]: Mautic\\LeadBundle\\EventListener\\LeadSubscriber->onFieldPostSave(Object(Mautic\\LeadBundle\\Event\\LeadFieldEvent), 'mautic.lead_fie...', Object(Symfony\\Component\\EventDispatcher\\ContainerAwareEventDispatcher))
#10 /var/www/torpedo/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(184): call_user_func(Array, Object(Mautic\\LeadBundle\\Event\\LeadFieldEvent), 'mautic.lead_fie...', Object(Symfony\\Component\\EventDispatcher\\ContainerAwareEventDispatcher))
#11 /var/www/torpedo/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(46): Symfony\\Component\\EventDispatcher\\EventDispatcher->doDispatch(Array, 'mautic.lead_fie...', Object(Mautic\\LeadBundle\\Event\\LeadFieldEvent))
#12 /var/www/torpedo/mautic/plugins/MauticEnhancerBundle/Integration/AbstractEnhancerIntegration.php(135): Symfony\\Component\\EventDispatcher\\EventDispatcher->dispatch('mautic.lead_fie...', Object(Mautic\\LeadBundle\\Event\\LeadFieldEvent))
#13 /var/www/torpedo/mautic/plugins/MauticEnhancerBundle/EventListener/PluginSubscriber.php(44): MauticPlugin\\MauticEnhancerBundle\\Integration\\AbstractEnhancerIntegration->buildEnhancerFields()
#14 [internal function]: MauticPlugin\\MauticEnhancerBundle\\EventListener\\PluginSubscriber->buildEnhancerFields(Object(Mautic\\PluginBundle\\Event\\PluginIntegrationEvent), 'mautic.plugin_o...', Object(Symfony\\Component\\EventDispatcher\\ContainerAwareEventDispatcher))
#15 /var/www/torpedo/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(184): call_user_func(Array, Object(Mautic\\PluginBundle\\Event\\PluginIntegrationEvent), 'mautic.plugin_o...', Object(Symfony\\Component\\EventDispatcher\\ContainerAwareEventDispatcher))
#16 /var/www/torpedo/mautic/vendor/symfony/event-dispatcher/EventDispatcher.php(46): Symfony\\Component\\EventDispatcher\\EventDispatcher->doDispatch(Array, 'mautic.plugin_o...', Object(Mautic\\PluginBundle\\Event\\PluginIntegrationEvent))
#17 /var/www/torpedo/mautic/app/bundles/PluginBundle/Controller/PluginController.php(266): Symfony\\Component\\EventDispatcher\\EventDispatcher->dispatch('mautic.plugin_o...', Object(Mautic\\PluginBundle\\Event\\PluginIntegrationEvent))
#18 /var/www/torpedo/mautic/vendor/symfony/http-kernel/HttpKernel.php(135): Mautic\\PluginBundle\\Controller\\PluginController->configAction('AgeFromBirthdat...', 'details-contain...', 0)
#19 /var/www/torpedo/mautic/vendor/symfony/http-kernel/HttpKernel.php(57): Symfony\\Component\\HttpKernel\\HttpKernel->handleRaw(Object(Symfony\\Component\\HttpFoundation\\Request), 1)
#20 /var/www/torpedo/mautic/vendor/symfony/http-kernel/DependencyInjection/ContainerAwareHttpKernel.php(67): Symfony\\Component\\HttpKernel\\HttpKernel->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)
#21 /var/www/torpedo/mautic/vendor/symfony/http-kernel/Kernel.php(183): Symfony\\Component\\HttpKernel\\DependencyInjection\\ContainerAwareHttpKernel->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)
#22 /var/www/torpedo/mautic/app/AppKernel.php(141): Symfony\\Component\\HttpKernel\\Kernel->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)
#23 /var/www/torpedo/mautic/app/middlewares/CORSMiddleware.php(93): AppKernel->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)
#24 /var/www/torpedo/mautic/app/middlewares/CatchExceptionMiddleware.php(45): Mautic\\Middleware\\CORSMiddleware->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)
#25 /var/www/torpedo/mautic/app/middlewares/VersionCheckMiddleware.php(57): Mautic\\Middleware\\CatchExceptionMiddleware->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)
#26 /var/www/torpedo/mautic/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Mautic\\Middleware\\VersionCheckMiddleware->handle(Object(Symfony\\Component\\HttpFoundation\\Request), 1, true)
#27 /var/www/torpedo/mautic/vendor/stack/run/src/Stack/run.php(13): Stack\\StackedHttpKernel->handle(Object(Symfony\\Component\\HttpFoundation\\Request))
un(Object(Stack\\StackedHttpKernel))p(37): Stack\
#29 {main}