diff --git a/src/Handler/Utils/Avs.hs b/src/Handler/Utils/Avs.hs
index 261dea6b9..400292445 100644
--- a/src/Handler/Utils/Avs.hs
+++ b/src/Handler/Utils/Avs.hs
@@ -585,16 +585,18 @@ getAvsCompany afi =
 
 -- | insert a company from AVS firm info or update an existing one based on previous values
 upsertAvsCompany :: AvsFirmInfo -> Maybe AvsFirmInfo -> DB (Entity Company)
+upsertAvsCompany newAvsFirmInfo (Just oldAvsFirmInfo)
+  | newAvsFirmInfo == oldAvsFirmInfo = maybeM (upsertAvsCompany newAvsFirmInfo Nothing) pure $ getAvsCompany newAvsFirmInfo  -- firmInfo unchanged, shortcircuit
 upsertAvsCompany newAvsFirmInfo mbOldAvsFirmInfo = do
     mbFirmEnt <- getAvsCompany newAvsFirmInfo --  primarily by AvsId, then Shorthand, then name
-    $logInfoS "AVS" [st|upsertAvsCompany: old #{tshow mbFirmEnt} new #{tshow newAvsFirmInfo}|]
-    case (mbFirmEnt, mbOldAvsFirmInfo) of
-      (Nothing, _) -> do                                                                                  -- insert new company, neither AvsId nor Shorthand exist in DB
+    $logInfoS "AVS" [st|upsertAvsCompany: old #{tshow mbOldAvsFirmInfo} new #{tshow newAvsFirmInfo} ent-new #{tshow mbFirmEnt}|]
+    case mbFirmEnt of
+      Nothing -> do                                                                                  -- insert new company, neither AvsId nor Shorthand exist in DB
         afn <- if 0 < newAvsFirmInfo ^. _avsFirmFirmNo
                 then return $ newAvsFirmInfo ^. _avsFirmFirmNo
                 else maybe (-1) (pred . companyAvsId . entityVal) <$> selectMaybe [CompanyAvsId <. 0] [Asc CompanyAvsId]
         let upd  = flip updateRecord newAvsFirmInfo
-            dmy = Company                                                                                 -- mostly dummy, values are actually prodcued through firmInfo2company below for consistency
+            dmy = Company                                                                            -- mostly dummy, values are actually produced through firmInfo2company below for consistency
                   { companyName           = newAvsFirmInfo ^. _avsFirmFirm          . from _CI
                   , companyShorthand      = newAvsFirmInfo ^. _avsFirmAbbreviation  . from _CI
                   , companyAvsId          = afn
@@ -606,11 +608,12 @@ upsertAvsCompany newAvsFirmInfo mbOldAvsFirmInfo = do
         $logInfoS "AVS" $ "Insert new company: " <> tshow cmp
         newCmp <- insertEntity cmp
         reportAdminProblem $ AdminProblemNewCompany $ entityKey newCmp
-        $logInfoS "AVS" "Insert new company completed."
         return newCmp
 
-      (Just Entity{entityKey=firmid, entityVal=firm}, oldAvsFirmInfo) -> do                               -- possibly update existing company, if isJust oldAvsFirmInfo and changed occurred
-        let cmp_ups = mapMaybe  (mkUpdate'            firm newAvsFirmInfo oldAvsFirmInfo) firmInfo2company
+      (Just Entity{entityKey=firmid, entityVal=firm}) -> do                                          -- possibly update existing company, if isJust oldAvsFirmInfo and identical AvsFirmNo and changes occurred
+        let oldHasSameFirmNo = Just (newAvsFirmInfo ^. _avsFirmFirmNo) == (mbOldAvsFirmInfo ^? _Just . _avsFirmFirmNo)
+            oldAvsFirmInfo = guardOnM oldHasSameFirmNo mbOldAvsFirmInfo
+            cmp_ups = mapMaybe  (mkUpdate'            firm newAvsFirmInfo oldAvsFirmInfo) firmInfo2company
             key_ups =            mkUpdate'            firm newAvsFirmInfo oldAvsFirmInfo  firmInfo2key
         uniq_ups    <-           mkUpdateCheckUnique' firm newAvsFirmInfo oldAvsFirmInfo  firmInfo2companyNo
         $logInfoS "AVS" [st|Update company #{companyShorthand firm}: #{tshow (length cmp_ups)}, #{tshow (length key_ups)}, #{tshow (length uniq_ups)} for #{tshow oldAvsFirmInfo}|]
@@ -629,7 +632,7 @@ upsertAvsCompany newAvsFirmInfo mbOldAvsFirmInfo = do
                | otherwise -> $logInfoS "AVS" $ "Update company shorthand failed for " <> ciOriginal cmp_key <> " and " <> ciOriginal alt_key
             maybeM (return res_cmp) return $ getBy uniq_cmp
           _otherwise -> return res_cmp
-        $logInfoS "AVS" "Update company completed."
+        $logInfoS "AVS" [st|Update company #{companyShorthand firm} completed.|]
         return res_cmp2
   where
     firmInfo2key =
diff --git a/src/Jobs/Handler/SynchroniseAvs.hs b/src/Jobs/Handler/SynchroniseAvs.hs
index 0e290328d..67f9a9399 100644
--- a/src/Jobs/Handler/SynchroniseAvs.hs
+++ b/src/Jobs/Handler/SynchroniseAvs.hs
@@ -122,11 +122,11 @@ dispatchJobSynchroniseAvsQueue = JobHandlerException $ do
       -- E.truncateTable $ AvsSync (error "truncateTable: AvsSyncUser not needed") now Nothing
       -- return jobs
     let (unlinked, linked) = foldl' discernJob mempty jobs
-    $logInfoS "SynchronisAvs" [st|AVS synch performing for #{length linked} AVS linked users and #{length unlinked} unlinked users|]
+    $logInfoS "SynchronisAvs" [st|AVS synch start for #{length linked} AVS linked users and #{length unlinked} unlinked users|]
     void $ updateAvsUserByIds  linked
     void $ linktoAvsUserByUIDs unlinked
     runDB $ deleteWhere [AvsSyncUser <-. (E.unValue . fst3 <$> jobs)]
-    $logInfoS "SynchronisAvs" [st|AVS synch performed for #{length linked} AVS linked users and #{length unlinked} unlinked users|]
+    $logInfoS "SynchronisAvs" [st|AVS synch end for #{length linked} AVS linked users and #{length unlinked} unlinked users|]
     -- we do not reschedule failed synchs here in order to avoid a loop
   where
     discernJob accs (         _ , E.Value (Just api), E.Value True  ) = accs & over _2 (Set.insert api)