diff --git a/src/Database/Esqueleto/Utils.hs b/src/Database/Esqueleto/Utils.hs
index 701ce9616..f3aec73aa 100644
--- a/src/Database/Esqueleto/Utils.hs
+++ b/src/Database/Esqueleto/Utils.hs
@@ -7,7 +7,6 @@ module Database.Esqueleto.Utils
   , SqlIn(..)
   , mkExactFilter, mkContainsFilter
   , anyFilter
-  , inList
   ) where
 
 import ClassyPrelude.Yesod hiding (isInfixOf, any, all)
@@ -100,12 +99,4 @@ anyFilter :: (Foldable f) => f (t -> Set.Set Text-> E.SqlExpr (E.Value Bool))
                    -> t -> Set.Set Text-> E.SqlExpr (E.Value Bool)
 anyFilter fltrs needle criterias = F.foldr aux false fltrs
   where
-    aux fltr acc = fltr needle criterias E.||. acc
-
--- | Convenience for Sorting by a Column being element of a certain List
---   Does not work, may produce esqueleto error
---   `unsafeSqlBinOp: non-id/composite keys not expected here` somehow
-inList :: (PersistField typ, PersistEntity val)
-          => EntityField val typ -> [typ] -> E.SqlExpr (Entity val) -> E.SqlExpr (E.Value Bool)
-inList _column [] = const $ E.val True
-inList  column l  = \row -> row E.^. column `E.in_` E.valList l
+    aux fltr acc = fltr needle criterias E.||. acc
\ No newline at end of file
diff --git a/src/Handler/Admin.hs b/src/Handler/Admin.hs
index 2322fb0a9..2ee38518b 100644
--- a/src/Handler/Admin.hs
+++ b/src/Handler/Admin.hs
@@ -404,8 +404,9 @@ postAdminFeaturesR = do
             ]
           dbtSorting    = Map.fromList
             [ ("key"   , SortColumn (E.^. StudyTermsKey))
-            , ("isnew" , SortColumn (StudyTermsKey `E.inList` (unStudyTermsKey <$> Set.toList newKeys)))
-            , ("isbad" , SortColumn (StudyTermsKey `E.inList` (unStudyTermsKey <$> Set.toList badKeys)))
+            , ("isnew" , SortColumn (\studyTerm -> studyTerm E.^. StudyTermsKey `E.in_` E.valList (unStudyTermsKey <$> Set.toList newKeys)))
+            -- Remember: sorting with E.in_ by StudyTermsId instead will produce esqueleto-error "unsafeSqlBinOp: non-id/composite keys not expected here"
+            , ("isbad" , SortColumn (\studyTerm -> studyTerm E.^. StudyTermsKey `E.in_` E.valList (unStudyTermsKey <$> Set.toList badKeys)))
             , ("name"  , SortColumn (E.^. StudyTermsName))
             , ("short" , SortColumn (E.^. StudyTermsShorthand))
             ]