Stephen,
Generally, there have been no changes to running the SQL's for a while.
On the other hand,
Except for a typo (missing the equal sign) on the first query, I don't see any differences between the 2 queries. Here are both queries copy and pasted from your original posts. Please elaborate, maybe I am missing something.
delete from era_user_roles_t where USER_ID'@Endpoint_AMS_Acct')
delete from era_user_roles_t where USER_ID = '@Endpoint_AMS_Acct'