Allow the previous version to upgrade correctly

debian/raspi-config.prerm

@@ -0,0 +1,36 @@
+#! /bin/sh
+# prerm script for raspi-config
+#
+# see: dh_installdeb(1)
+
+set -e
+
+# summary of how this script can be called:
+#        * <prerm> `remove'
+#        * <prerm> `purge'
+#        * <old-prerm> `upgrade' <new-version>
+#        * <new-prerm> `failed-upgrade' <old-version>
+#        * <new-prerm> `abort-install'
+#        * <new-prerm> `abort-install' <old-version>
+#        * <new-prerm> `abort-upgrade' <old-version>
+#        * <disappearer's-prerm> `disappear' <overwriter> <new-version>
+# for details, see http://www.debian.org/doc/debian-policy/ or
+# the debian-policy package
+
+
+case "$1" in
+	purge|remove|upgrade)
+		;;
+
+	failed-upgrade|abort-install|abort-upgrade|disappear)
+		;;
+
+	*)
+		echo "prerm called with unknown argument \`$1'" >&2
+		exit 1
+		;;
+esac
+
+#DEBHELPER#
+
+exit 0