OmegaUtils: deal with repeated keys (again)

scripts/OmegaUtils.pm

@@ -19,7 +19,7 @@ sub getLabels
 			if (/$key[= ]([^ ]+)/) {
 				my $newVal = $1;
 				my $prev = ${$hptr->{$key}};
-				if ($prev) {
+				if ($prev && $prev != $newVal) {
 					print STDERR "Already a previous value for $key of $prev\n";
 					print "New value is $newVal\n";
 					print "To take new value press ENTER. Or enter value ";

scripts/sample.tex

@@ -2,7 +2,7 @@
 \documentclass{standalone}
 \usepackage{tikz}
 \usepackage{pgfplots}
-\pgfplotsset{compat=1.13}
+\pgfplotsset{compat=1.16}
 \input{palette.tex}
 \usepgfplotslibrary{colormaps}