situation: first keywordtest has name 1; second keywordtest has name 2; keywordtest 2 calls keywordtest 1 (by using Run Keyword test command); User deletes keywordtest 1 from projectexplorer....
In 12.5, there is some better logic in the "find declaration" that actually works on keyword tests. So, before you do the deletion, make it SOP to check if it is used somewhere first.