diff --git a/dotdrop/cfg_aggregator.py b/dotdrop/cfg_aggregator.py
index 3f074db..bdaf8d8 100644
--- a/dotdrop/cfg_aggregator.py
+++ b/dotdrop/cfg_aggregator.py
@@ -238,7 +238,7 @@ class CfgAggregator:
         while newkey in keys:
             # if unable to get a unique path
             # get a random one
-            newkey = self.key_sep.join([key, cnt])
+            newkey = self.key_sep.join([key, str(cnt)])
             cnt += 1
         return newkey
 
diff --git a/tests-ng/import-duplicate.sh b/tests-ng/import-duplicate.sh
new file mode 100755
index 0000000..47533ed
--- /dev/null
+++ b/tests-ng/import-duplicate.sh
@@ -0,0 +1,109 @@
+#!/usr/bin/env bash
+# author: deadc0de6 (https://github.com/deadc0de6)
+# Copyright (c) 2019, deadc0de6
+#
+# test import duplicates
+#
+
+# exit on first error
+set -e
+
+# all this crap to get current path
+rl="readlink -f"
+if ! ${rl} "${0}" >/dev/null 2>&1; then
+  rl="realpath"
+
+  if ! hash ${rl}; then
+    echo "\"${rl}\" not found !" && exit 1
+  fi
+fi
+cur=$(dirname "$(${rl} "${0}")")
+
+#hash dotdrop >/dev/null 2>&1
+#[ "$?" != "0" ] && echo "install dotdrop to run tests" && exit 1
+
+#echo "called with ${1}"
+
+# dotdrop path can be pass as argument
+ddpath="${cur}/../"
+[ "${1}" != "" ] && ddpath="${1}"
+[ ! -d ${ddpath} ] && echo "ddpath \"${ddpath}\" is not a directory" && exit 1
+
+export PYTHONPATH="${ddpath}:${PYTHONPATH}"
+bin="python3 -m dotdrop.dotdrop"
+
+echo "dotdrop path: ${ddpath}"
+echo "pythonpath: ${PYTHONPATH}"
+
+# get the helpers
+source ${cur}/helpers
+
+echo -e "\e[96m\e[1m==> RUNNING $(basename $BASH_SOURCE) <==\e[0m"
+
+################################################################
+# this is the test
+################################################################
+
+# the dotfile source
+tmps=`mktemp -d --suffix='-dotdrop-tests'`
+mkdir -p ${tmps}/dotfiles
+# the dotfile destination
+tmpd=`mktemp -d --suffix='-dotdrop-tests'`
+#echo "dotfile destination: ${tmpd}"
+
+# create the dotfile
+touch ${tmpd}/.colors
+mkdir -p ${tmpd}/.mutt
+touch ${tmpd}/.mutt/colors
+
+# create the config file
+cfg="${tmps}/config.yaml"
+
+cat > ${cfg} << _EOF
+config:
+  backup: true
+  create: true
+  dotpath: dotfiles
+  longkey: false
+dotfiles:
+  f_colors:
+    src: abc
+    dst: abc
+  f_mutt_colors:
+    src: abc
+    dst: abc
+  f_`echo ${tmpd} | sed -e 's#^/\(.*\)$#\1#g' | sed 's#/#_#g' | tr '[:upper:]' '[:lower:]'`_colors:
+    src: abc
+    dst: abc
+  f_`echo ${tmpd} | sed -e 's#^/tmp/\(.*\)$#\1#g' | sed 's#/#_#g' | tr '[:upper:]' '[:lower:]'`_colors:
+    src: abc
+    dst: abc
+  f_`echo ${tmpd} | sed -e 's#^/\(.*\)$#\1#g' | sed 's#/#_#g' | tr '[:upper:]' '[:lower:]'`_mutt_colors:
+    src: abc
+    dst: abc
+  f_`echo ${tmpd} | sed -e 's#^/tmp/\(.*\)$#\1#g' | sed 's#/#_#g' | tr '[:upper:]' '[:lower:]'`_mutt_colors:
+    src: abc
+    dst: abc
+profiles:
+_EOF
+cat ${cfg}
+
+# import
+cd ${ddpath} | ${bin} import -c ${cfg} -p p1 -V ${tmpd}/.mutt/colors
+cd ${ddpath} | ${bin} import -c ${cfg} -p p1 -V ${tmpd}/.colors
+
+cat ${cfg}
+
+# ensure exists and is not link
+[ ! -d ${tmps}/dotfiles/${tmpd}/.mutt ] && echo "not a directory" && exit 1
+[ ! -e ${tmps}/dotfiles/${tmpd}/.mutt/colors ] && echo "not exist" && exit 1
+[ ! -e ${tmps}/dotfiles/${tmpd}/.colors ] && echo "not exist (2)" && exit 1
+
+cat ${cfg} | grep ${tmpd}/.mutt/colors >/dev/null 2>&1
+cat ${cfg} | grep ${tmpd}/.colors >/dev/null 2>&1
+
+## CLEANING
+rm -rf ${tmps} ${tmpd}
+
+echo "OK"
+exit 0