diff --git a/fhem/contrib/DS_Starter/50_SSFile.pm b/fhem/contrib/DS_Starter/50_SSFile.pm
index d0f7223cd..cdbcb68e5 100644
--- a/fhem/contrib/DS_Starter/50_SSFile.pm
+++ b/fhem/contrib/DS_Starter/50_SSFile.pm
@@ -144,6 +144,7 @@ BEGIN {
 
 # Versions History intern
 my %vNotesIntern = (
+  "0.7.5"  => "07.12.2020  minor fix avoid overtakers ",
   "0.7.4"  => "30.11.2020  add mtime, crtime to uploaded files ",
   "0.7.3"  => "29.11.2020  fix (prepare)Download without dest= option",
   "0.7.2"  => "22.11.2020  undef variables containing a lot of data in execOp ",
@@ -1347,6 +1348,11 @@ sub getApiSites {
        return $ret;  
    }
    
+   if($hash->{OPMODE}) {                                   # Überholer vermeiden wenn eine Operation läuft (V. 0.7.5" => "07.12.2020)
+       Log3($name, 4, qq{$name - Operation "$hash->{OPMODE} (idx: $hash->{OPIDX})" is still running. Next operation start postponed}); 
+       return;                                  
+   }
+   
    # den nächsten Eintrag aus "SendQueue" selektieren und ausführen wenn nicht forbidSend gesetzt ist
    for my $idx (sort{$a<=>$b} keys %{$data{$type}{$name}{sendqueue}{entries}}) {
        if (!$data{$type}{$name}{sendqueue}{entries}{$idx}{forbidSend}) {