diff --git a/weed/server/filer_server_handlers_write_autochunk.go b/weed/server/filer_server_handlers_write_autochunk.go
index 8b3fc45fb..6732db195 100644
--- a/weed/server/filer_server_handlers_write_autochunk.go
+++ b/weed/server/filer_server_handlers_write_autochunk.go
@@ -49,7 +49,7 @@ func (fs *FilerServer) autoChunk(ctx context.Context, w http.ResponseWriter, r *
 	if err != nil {
 		if strings.HasPrefix(err.Error(), "read input:") || err.Error() == io.ErrUnexpectedEOF.Error() {
 			writeJsonError(w, r, 499, err)
-		} else if strings.HasSuffix(err.Error(), "is a file") {
+		} else if strings.HasSuffix(err.Error(), "is a file") || strings.HasSuffix(err.Error(), "already exists") {
 			writeJsonError(w, r, http.StatusConflict, err)
 		} else {
 			writeJsonError(w, r, http.StatusInternalServerError, err)