diff --git a/app/controllers/pull_requests_controller.rb b/app/controllers/pull_requests_controller.rb
index 47e55af15..12e67ccc2 100644
--- a/app/controllers/pull_requests_controller.rb
+++ b/app/controllers/pull_requests_controller.rb
@@ -227,7 +227,7 @@ class PullRequestsController < ApplicationController
 
             # 查看是否fix了相关issue，如果fix就转账
             @pull_request.attached_issues.each do |issue| 
-              next if PullAttachedIssue.exist?(issue_id: issue.id, fixed: true)
+              next if PullAttachedIssue.exists?(issue_id: issue.id, fixed: true)
               token_num = issue.blockchain_token_num
               token_num = token_num.nil? ? 0 : token_num
               author_id = @pull_request.user_id
diff --git a/app/services/api/v1/issues/update_service.rb b/app/services/api/v1/issues/update_service.rb
index 85190fe95..04db49177 100644
--- a/app/services/api/v1/issues/update_service.rb
+++ b/app/services/api/v1/issues/update_service.rb
@@ -42,7 +42,7 @@ class Api::V1::Issues::UpdateService < ApplicationService
       check_assigners(assigner_ids) unless assigner_ids.nil?
       check_attachments(attachment_ids) unless attachment_ids.nil?
       check_atme_receivers(receivers_login) unless receivers_login.nil?
-      check_blockchain_token_num(project.user_id, project.id, blockchain_token_num, @issue.blockchain_token_num) if blockchain_token_num.present?
+      check_blockchain_token_num(project.user_id, project.id, blockchain_token_num, (@issue.blockchain_token_num || 0)) if blockchain_token_num.present?
       load_assigners(assigner_ids)
       load_attachments(attachment_ids)
       load_issue_tags(issue_tag_ids)
@@ -137,8 +137,8 @@ class Api::V1::Issues::UpdateService < ApplicationService
 
   def build_cirle_blockchain_token
     if @updated_issue.previous_changes["blockchain_token_num"].present? 
-      unlock_balance_on_blockchain(@updated_issue.project&.user_id, @updated_issue.project_id, @updated_issue.previous_changes["blockchain_token_num"][0])
-      lock_balance_on_blockchain(@updated_issue.project&.user_id, @updated_issue.project_id, @updated_issue.previous_changes["blockchain_token_num"][1])
+      unlock_balance_on_blockchain(@updated_issue.project&.user_id.to_s, @updated_issue.project_id.to_s, @updated_issue.previous_changes["blockchain_token_num"][0].to_i) if @updated_issue.previous_changes["blockchain_token_num"][0].present?
+      lock_balance_on_blockchain(@updated_issue.project&.user_id.to_s, @updated_issue.project_id.to_s, @updated_issue.previous_changes["blockchain_token_num"][1].to_i) if @updated_issue.previous_changes["blockchain_token_num"][1].present?
     end
   end