diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0eadd3e75..b064d1c9a5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Next release
 
+- Fix a bug: unable to reset OpenApi token
+
 ## v6.3.32 2024 July 22
 
 - Fix a bug: manager cannot pay a subscription(payment schedule) with a wallet
diff --git a/app/models/open_api/client.rb b/app/models/open_api/client.rb
index 9d537d379c..80e1eabf0d 100644
--- a/app/models/open_api/client.rb
+++ b/app/models/open_api/client.rb
@@ -3,16 +3,16 @@
 # OpenAPI::Client keeps track of the authorized accesses to the 3-rd party API (aka. OpenAPI)
 class OpenAPI::Client < ApplicationRecord
   validates :name, presence: true
-  validates_uniqueness_of :token
+  validates :token, uniqueness: true
 
   before_create :set_initial_token
 
   def increment_calls_count
-    update_column(:calls_count, calls_count+1)
+    update_column(:calls_count, calls_count + 1)
   end
 
   def regenerate_token
-    update_attributes(token: generate_unique_secure_token)
+    update(token: generate_unique_secure_token)
   end
 
   private