diff --git a/app/models/account.rb b/app/models/account.rb
index 11a3c21fe483fa7b146298f5cbd42c3a5e6c6b59..930fd1674e6533adb81ab38e58c93d462d6ed6ec 100644
--- a/app/models/account.rb
+++ b/app/models/account.rb
@@ -240,6 +240,7 @@ class Account < ApplicationRecord
   def fields_attributes=(attributes)
     fields     = []
     old_fields = self[:fields] || []
+    old_fields = [] if old_fields.is_a?(Hash)
 
     if attributes.is_a?(Hash)
       attributes.each_value do |attr|
diff --git a/app/services/suspend_account_service.rb b/app/services/suspend_account_service.rb
index fc3bc03a532db3e05e0aca6610abaa29cf73c357..b2ae3a47c169b48adbe3d9d7ea5c9bd8fd15c4df 100644
--- a/app/services/suspend_account_service.rb
+++ b/app/services/suspend_account_service.rb
@@ -84,7 +84,7 @@ class SuspendAccountService < BaseService
     @account.locked           = false
     @account.display_name     = ''
     @account.note             = ''
-    @account.fields           = {}
+    @account.fields           = []
     @account.statuses_count   = 0
     @account.followers_count  = 0
     @account.following_count  = 0