--- samba-4.3.7.orig/debian/samba-libs.preinst	2016-04-13 15:08:11.228019009 +0200
+++ samba-4.3.7/debian/samba-libs.preinst	2016-04-13 15:12:10.477629672 +0200
@@ -16,11 +16,18 @@
 			if [ -e /var/lib/samba/private/$file ] &&
 				[ ! /var/lib/samba/$file -ef /var/lib/samba/private/$file ]
 			then
-				echo $file exists in /var/lib/samba and /var/lib/samba/private, aborting samba-libs preinst
-				echo rename one of them to allow the install/upgrade to continue
-				echo http://bugs.debian.org/726472
-				ls -al /var/lib/samba /var/lib/samba/private
-				exit 1
+				echo "$file exists in /var/lib/samba and /var/lib/samba/private,"
+				if [ "/var/lib/samba/$file" -ot "/var/lib/samba/private/$file" ]
+				then
+					echo "/var/lib/samba/$file is older, renaming to .bak"
+					mv "/var/lib/samba/$file" "/var/lib/samba/$file.bak"
+				else
+					echo aborting samba-libs preinst
+					echo rename one of them to allow the install/upgrade to continue
+					echo http://bugs.debian.org/726472
+					ls -al /var/lib/samba /var/lib/samba/private
+					exit 1
+				fi
 			fi
 		fi
 	done