If I submit single value from dropdown of custom entity field then it will save in data in db. below is the code, working fine.

$fields['participants'] = BaseFieldDefinition::create('entity_reference')
  ->setDescription(t('The Participants of the report.'))
  ->setSetting('target_type', 'taxonomy_term')
  ->setSetting('handler', 'default:taxonomy_term')
    'target_bundles' => array(
     'stakeholders' => 'stakeholders'
  ->setDisplayOptions('view', array(
    'label' => 'hidden',
    'type' => 'list_default',
    'weight' => 0,
  ->setDisplayOptions('form', array(
    'type' => 'options_select',
    'weight' => 3,
    'settings' => array(
      'match_operator' => 'CONTAINS',
      'size' => '60',
      'autocomplete_type' => 'tags',
      'placeholder' => '',
  ->setDisplayConfigurable('form', TRUE)
  ->setDisplayConfigurable('view', TRUE);

when I want to submit multiple value by selecting multiple value from same dropdown by using


this will allow me to select multiple value from dropdown but when I submit form it will give error like

Base table or view not found: 1146 Table 'tempmukun.reports__participants' doesn't exist

no idea what I am missing, Does any one have idea? Thanks

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