Quick installation error

This is what I get at the end after I type the suggested string "drush en -y fb_autopost fb_autopost_entity fb_autopost_types && drush download-facebook-php-sdk"

exception 'FieldException' with message 'Cannot change an existing field's type.' in                                        [error]
/data/all/000/core/drupal-7.38.1/modules/field/field.crud.inc:234
Stack trace:
#0 /data/disk/o5510979444/distro/023/drupal-7.38.1-prod/sites/all/modules/features/includes/features.field.inc(279):
field_update_field(Array)
#1 [internal function]: field_base_features_rebuild('fb_autopost_typ...', 'field_base')
#2 /data/disk/o5510979444/distro/023/drupal-7.38.1-prod/sites/all/modules/features/features.module(594):
call_user_func_array('field_base_feat...', Array)
#3 /data/disk/o5510979444/distro/023/drupal-7.38.1-prod/sites/all/modules/features/features.module(998):
features_invoke('field_base', 'features_rebuil...', 'fb_autopost_typ...')
#4 /data/disk/o5510979444/distro/023/drupal-7.38.1-prod/sites/all/modules/features/features.module(384):
_features_restore('rebuild', Array)
#5 [internal function]: features_modules_enabled(Array)
#6 /data/all/000/core/drupal-7.38.1/includes/module.inc(895): call_user_func_array('features_module...', Array)
#7 /data/all/000/core/drupal-7.38.1/includes/module.inc(499): module_invoke_all('modules_enabled', Array)
#8 /opt/tools/drush/7/drush/commands/core/drupal/environment_7.inc(143): module_enable(Array)
#9 /opt/tools/drush/7/drush/commands/pm/pm.drush.inc(1120): drush_module_enable(Array)
#10 [internal function]: drush_pm_enable('fb_autopost', 'fb_autopost_ent...', 'fb_autopost_typ...')
#11 /opt/tools/drush/7/drush/includes/command.inc(368): call_user_func_array('drush_pm_enable', Array)
#12 /opt/tools/drush/7/drush/includes/command.inc(219): _drush_invoke_hooks(Array, Array)
#13 [internal function]: drush_command('fb_autopost', 'fb_autopost_ent...', 'fb_autopost_typ...')
#14 /opt/tools/drush/7/drush/includes/command.inc(187): call_user_func_array('drush_command', Array)
#15 /opt/tools/drush/7/drush/lib/Drush/Boot/BaseBoot.php(62): drush_dispatch(Array)
#16 /opt/tools/drush/7/drush/drush.php(70): Drush\Boot\BaseBoot->bootstrap_and_dispatch()
#17 /opt/tools/drush/7/drush/drush.php(11): drush_main()
#18 {main}