Fix ransack_alias issue, close #1239 (#1512)

* Fix `ransack_alias` issue, close #1239

* Update lib/ransack/nodes/grouping.rb

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Sean <sean@immersive-app.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: 3 people

lib/ransack/nodes/grouping.rb

@@ -53,7 +53,7 @@ def [](key)
       end
 
       def []=(key, value)
-        conditions.reject! { |c| c.key == key.to_s }
+        conditions.reject! { |c| c.key == key.to_s && c&.value == value&.value }
         self.conditions << value
       end