Fix: adds created_by_operator constraint for duplicate checking

lib/blacklist.js

@@ -14,7 +14,7 @@ const getBlacklist = () => {
 // Delete row from blacklist table by crypto code and address
 const deleteFromBlacklist = (cryptoCode, address) => {
   return db.none(
-    'delete from blacklist where crypto_code = $1 and address = $2;',
+    `DELETE FROM blacklist WHERE created_by_operator = 't' AND crypto_code = $1 AND address = $2`,
     [cryptoCode, address]
   )
 }