diff --git a/README.md b/README.md
index 6207d64..71f3a0e 100644
--- a/README.md
+++ b/README.md
@@ -155,11 +155,25 @@ available tags.
 
 See [default configuration](https://github.com/nvim-telescope/telescope.nvim#telescope-defaults) for full details on configuring Telescope.
 
+- `auto_validate`  (default: `true`)
+
+  If `true`, it removes stale entries count over than `db_validate_threshold`. See
+  the note for [DB maintenance](#maintainance)
+
 - `db_root` (default: `vim.fn.stdpath "data"`)
 
   Path to parent directory of custom database location. Defaults to
   `$XDG_DATA_HOME/nvim` if unset.
 
+- `db_safe_mode` (default: `true`)
+
+  If `true`, it shows confirmation dialog by `vim.ui.select()` before validating
+  DB. See the note for [DB maintenance](#maintainance).
+
+- `db_validate_threshold` (default: `10`)
+
+  It will removes over than this count in validating DB.
+
 - `default_workspace` (default: `nil`)
 
   Default workspace tag to filter by e.g. `'CWD'` to filter by default to the
@@ -170,6 +184,10 @@ See [default configuration](https://github.com/nvim-telescope/telescope.nvim#tel
 
   Disable devicons (if available)
 
+- `filter_delimiter` (default: `":"`)
+
+  Delimiters to indicate the filter like `:CWD:`.
+
 - `ignore_patterns` (default: `{ "*.git/*", "*/tmp/*", "term://*" }`)
 
   Patterns in this table control which files are indexed (and subsequently
diff --git a/lua/frecency/frecency.lua b/lua/frecency/frecency.lua
index 30abd94..ce7db73 100644
--- a/lua/frecency/frecency.lua
+++ b/lua/frecency/frecency.lua
@@ -180,7 +180,7 @@ function Frecency:validate_database(force)
     self.database:remove_files(unlinked)
     self:notify("removed %d missing entries.", #unlinked)
   end
-  if force and not self.config.db_safe_mode then
+  if not self.config.db_safe_mode then
     remove_entries()
     return
   end