diff --git a/fhem/contrib/DS_Starter/93_DbRep.pm b/fhem/contrib/DS_Starter/93_DbRep.pm
index 4cb5d6adf..cf93d0ddb 100644
--- a/fhem/contrib/DS_Starter/93_DbRep.pm
+++ b/fhem/contrib/DS_Starter/93_DbRep.pm
@@ -57,6 +57,7 @@ no if $] >= 5.017011, warnings => 'experimental::smartmatch';
 
 # Version History intern
 my %DbRep_vNotesIntern = (
+  "8.50.5"  => "05.12.2022  fix diffValue problem (DbRep_diffval) for newer MariaDB versions: https://forum.fhem.de/index.php/topic,130697.0.html ", 
   "8.50.4"  => "04.11.2022  fix daylight saving bug in aggregation eq 'month' (_DbRep_collaggstr) ",
   "8.50.3"  => "19.09.2022  reduce memory allocation of function DbRep_reduceLog ",
   "8.50.2"  => "17.09.2022  release setter 'index' for device model 'Agent' ",
@@ -4228,6 +4229,7 @@ return;
 ####################################################################################################
 sub DbRep_diffval {
   my $paref   = shift;
+  
   my $hash    = $paref->{hash};
   my $name    = $paref->{name};
   my $table   = $paref->{table};
@@ -4251,7 +4253,7 @@ sub DbRep_diffval {
   my @ts = split("\\|", $ts);                                                            # Timestampstring to Array
   Log3 ($name, 5, "DbRep $name - Timestamp-Array: \n@ts");  
  
-  if($dbmodel eq "MYSQL2") {
+  if($dbmodel eq "OLDMYSQLVER") {                                                        # Forum: https://forum.fhem.de/index.php/topic,130697.0.html
       $selspec = "TIMESTAMP,VALUE, if(VALUE-\@V < 0 OR \@RB = 1 , \@diff:= 0, \@diff:= VALUE-\@V ) as DIFF, \@V:= VALUE as VALUEBEFORE, \@RB:= '0' as RBIT ";
   } 
   else {
@@ -4270,7 +4272,7 @@ sub DbRep_diffval {
       my $runtime_string_next   = $a[2];  
       $runtime_string           = encode_base64($runtime_string,""); 
      
-      if($dbmodel eq "MYSQL2") {
+      if($dbmodel eq "OLDMYSQLVER") {                                                   # Forum: https://forum.fhem.de/index.php/topic,130697.0.html
           $err = DbRep_dbhDo ($name, $dbh, "set \@V:= 0, \@diff:= 0, \@diffTotal:= 0, \@RB:= 1;");      # @\RB = Resetbit wenn neues Selektionsintervall beginnt
           return "$name|$err" if ($err);
       }
@@ -4285,7 +4287,7 @@ sub DbRep_diffval {
       ($err, $sth) = DbRep_prepareExecuteQuery ($name, $dbh, $sql);
       return "$name|$err" if ($err);
 
-      if($dbmodel eq "MYSQL2") {
+      if($dbmodel eq "OLDMYSQLVER") {                                                  # Forum: https://forum.fhem.de/index.php/topic,130697.0.html
           @array = map { $runtime_string." ".$_ -> [0]." ".$_ -> [1]." ".$_ -> [2]."\n" } @{ $sth->fetchall_arrayref() };
       } 
       else {