Deprecation: #85678 - $GLOBALS['TSFE']->altPageTitle 

See forge#85678

Description 

The PHP property $GLOBALS['TSFE']->altPageTitle has been marked as deprecated and will be removed with TYPO3 v10.

Impact 

Installations using this property will trigger a PHP E_USER_DEPRECATED error.

Affected Installations 

Instances using the property.

Migration 

Please use the new PageTitle API to alter the title tag.