Error with translation turned on

Problem/Motivation

If translation is turned on i receive the following error: Warning: Undefined array key "start_link" in Drupal\Core\Field\Entity\BaseFieldOverride->getBaseFieldDefinition() (line 189 of /var/www/html/web/core/lib/Drupal/Core/Field/Entity/BaseFieldOverride.php)

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes