diff --git a/commands/add.py b/commands/add.py
index 249a82e..64cc63e 100644
--- a/commands/add.py
+++ b/commands/add.py
@@ -51,26 +51,6 @@ def run(args, persoconf, logger):
     if args.conf is None:
         exit()
 
-    # Check that the conf file we are saving exists
-    if args.confname:
-        confname = args.confname
-    else:
-        confname = args.conf
-
-        # We need to remove trailing '/' because 'os.path.basename("toto/")'
-        # returns ''. And that's not cool.
-        while confname[-1] == os.path.sep :
-            confname = confname[:-1] # Remove trailing slashes
-
-        confname = os.path.basename(confname)
-
-        # Remove leading dots, so the name under which the conffile is saved is
-        # not hidden.
-        while confname[0] == ".":
-            confname = confname[1:] # Remove leading dots
-
-    confpath = appdir + "/" + confname
-
     # Load app META file
     try:
         appmeta = Metafile( json_path = os.path.join( appdir             ,
@@ -107,6 +87,43 @@ def run(args, persoconf, logger):
                       % (absconf, dstdic[absconf], args.app)   )
         exit(1)
 
+    # Check that the conf file we are saving exists
+    if args.confname:
+        confname = args.confname
+    else:
+        confname = args.conf
+
+        # We need to remove trailing '/' because 'os.path.basename("toto/")'
+        # returns ''. And that's not cool.
+        while confname[-1] == os.path.sep :
+            confname = confname[:-1] # Remove trailing slashes
+
+        confname = os.path.basename(confname)
+
+        # Remove leading dots, so the name under which the conffile is saved is
+        # not hidden.
+        while confname[0] == ".":
+            confname = confname[1:] # Remove leading dots
+
+
+    # Check the conf file name
+    if (    confname == persoconf.metafile
+         or confname in appmeta.files ):
+        logger.info( "Confname '%s' is already taken: trying another one"
+                        % confname )
+
+        ending = 1
+
+        while (    confname + "." + str(ending) == persoconf.metafile
+                or confname + "." + str(ending) in appmeta.files ):
+            ending += 1
+
+        confname = confname + "." + str(ending)
+        logger.info( "New confname is '%s'" % confname )
+
+    # Deduce the path from the conf file name
+    confpath = appdir + "/" + confname
+
     # Copy the file (or directory)
     if utils.copy_file_or_directory( logger            ,
                                      path_dst=confpath ,