[WEBSITE-846] Ghost Words in Community Courses (Decks)

Description: Previously deleted words in community courses causes users to be met with an error message “Sorry, there was an error loading the session”.

Status: Unresolved

Related Issues:

  1. [WEBSITE-975] Completed courses show up as un-finished (Web / Mobile)
  2. [QA-207] Completed courses with ignored items show up as unfinished on (Android)